Star Trek: TNG episode
"Time’s Arrow, Part 1 Time’s Arrow, Part 2"
Data confronts his mortality in "Time's Arrow".
Episode no.	126 (Part 1) #127 (Part 2)
Prod. code	226 (Part 1) #227 (Part 2)
Airdate	June 15, 1992 (Part 1) September 21, 1992 (Part 2)
Writer(s)	Joe Menosky Michael Piller (Part 1) Jeri Taylor (Part 2)
Director	Les Landau
Guest star(s)	Jerry Hardin Michael Aron Barry Kivel (Part 1) Ken Thorley (Part 1) Sheldon Peters Wolfchild (Part 1) Jack Murdock (Part 1) Marc Alaimo (Part 1) Milt Tarver (Part 1) Michael Hungerford (Part 1) Bill Cho Lee (Part 2) William Boyett (Part 2) Mary Stein (Part 2) James Gleason (Part 2) Alexander Enberg (Part 2) Van Epperson (Part 2) Pamela Kosh (Part 2)
Year	2368 & 1893
Stardate	45959.1 (Part 1) 46001.3 (Part 2)
Episode chronology
Previous	"The Inner Light"
Next	"Realm of Fear"

"Time’s Arrow" is the 26th episode of the fifth season of the science fiction television series Star Trek: The Next Generation. A two-part episode of Star Trek: TNG, the first episode was a cliffhanger season finale for the fifth season and the second episode a premiere for the sixth. Image File history File links ST-TNG_Time's_Arrow_Part_1. ... June 15 is the 166th day of the year in the Gregorian calendar (167th in leap years), with 199 days remaining. ... 1992 (MCMXCII) was a leap year starting on Wednesday. ... September 21 is the 264th day of the year (265th in leap years). ... 1992 (MCMXCII) was a leap year starting on Wednesday. ... Screenwriters, scenarists or script writers, are authors who write the screenplays from which movies and television programs are made. ... Joe Menosky is the Star Trek writer credited with starting the trend of trying to work the number 47 into every script. ... Michael Piller (born May 30, 1948) is an American television and cinema screenwriter. ... Jeri Taylor (born June 30, 1946) is a television scriptwriter and producer who is known for her contributions to the Star Trek series. ... A television director is usually responsible for directing the actors and other taped aspects of a television production. ... Les Landau is a television director, film director and film producer best known for his work in Star Trek: The Next Generation, Star Trek: DS9, Star Trek: Voyager and Star Trek: Enterprise. ... Jerry Hardin (born 20 November 1929 in Dallas Texas) is a United States actor who has made many television and film appearances. ... Ken Thorley is an actor. ... Marc Alaimo is an American actor. ... William Boyett (1927-December 29, 2004) was an American actor best known for his work as the low-key but authoritative Sgt. ... Alexander Enberg (born April 5, 1972) is an actor and film producer who is the son of television scriptwriter and producer Jeri Taylor. ... Anthony Van Epperon (born February 21, 1957 in Sweetwater, Tennessee, USA) is an American actor. ... This article or section is not written in the formal tone expected of an encyclopedia article. ... The Inner Light is an episode of Star Trek: The Next Generation, the penultimate episode of its fifth season. ... Realm of Fear is a Star Trek: The Next Generation episode primarily centered around Reginald Barclays paralyzing fear of the transporter. ... Science fiction is a form of speculative fiction principally dealing with the impact of imagined science and technology, or both, upon society and persons as individuals. ... A television program is the content of television broadcasting. ... The title as it appeared in most episodes opening credits. ...

Plot

Overview: Mr. Data's severed head is discovered in a 500 year old cavern near Starfleet Headquarters. Data,[1] portrayed by Brent Spiner, is a character in the Star Trek fictional universe. ... Starfleet Command symbol In the fictional universe of Star Trek, Starfleet is the paramilitary defense, research, diplomacy, and exploration force of the United Federation of Planets (UFP) with – as of the late 24th century – hundreds of starships and starbases at its disposal. ...

Part 1

The Enterprise is recalled to Sector 001 (Earth) on a priority mission, the crew only being told that evidence has been discovered which indicates the presence of extraterrestrials on Earth – 500 years earlier. Beaming down to Starfleet Headquarters in San Francisco, Captain Picard and Data are conducted to a cavern a mile beneath the surface, where they are shown a variety of recovered artifacts including a Colt Single Action Army revolver and an engraved Pocket watch. Their guide explains that originally work crews were in the cavern to install seismic regulators, but something kept interfering with the equipment. The interference turned out to be due to Triolic waves being given off by the walls of the cavern, which was exposed to the radiation back to the 19th century. The Triolic emissions had to be of an alien origin, since such emanations would not exist on Earth in either the 19th or 24th century, due to their deleterious nature to humans. Picard observes that while all this is interesting, he still has to wonder why Starfleet chose to involve the Enterprise in the investigation. Explaining that there was one more artifact he hadn't shown them yet, their guide pulls back a cover to reveal Data's severed head lying on the floor of the cavern. The USS Enterprise (NCC-1701-D) (or Enterprise-D, to distinguish it from prior starships with the same name) is a 24th century starship in the Star Trek fictional universe and the principal setting of the Star Trek: The Next Generation television series. ... In the fictional universe of Star Trek, Sector 001 refers to the area of space that Earths Solar System falls in. ... Captain Jean-Luc Picard, played by Patrick Stewart, is a character in the TV series Star Trek: The Next Generation. ... Modern copy of the Colt Single Action Army handgun The Colt Single Action Army handgun, also known as the Colt Peacemaker or Single Action Army, the most exotic of which being the Black Powder model, is a single action revolver holding 6 rounds of ammunition. ... A gold pocket watch An early reference to the pocket watch is in a letter in November 1462 from the Italian clockmaker Bartholomew Manfredi to the Marchese di Manta, where he offers him a pocket clock better than that belonging to the Duke of Modena. ...

Aboard the Enterprise, Chief Engineer Geordi La Forge analyzes the information which has been gathered, and comes up with some facts about the aliens. For one thing, their resistance to Triolic radiation indicates they may be shape shifters, which would enable them to pass themselves off as humans while on Earth. He also finds a cellular fossil of type L-B-10445 which is native to the planet Devidia II in the Marrab sector. Picard orders Commander Riker to set course for Devidia. Geordi La Forge is a regular character in the television series Star Trek: The Next Generation, played by LeVar Burton. ... Captain William Thomas Will Riker is a Star Trek character, played by Jonathan Frakes. ...

Upon arrival at Devidia, Data locates a temporal disturbance and Triolic waves. Riker, Lt. Worf, Geordi, and Deanna Troi form an away team to investigate, but fearing for Data's safety, Picard does not let Data go. Worf (Klingon: worIv) is a Klingon Starfleet officer in the Star Trek fictional universe. ... Commander Deanna Troi is a fictional character in the Star Trek universe, played by the actress Marina Sirtis in the series Star Trek: The Next Generation (TNG), Star Trek: Voyager, Star Trek: Enterprise (the latter two only in guest appearances), and in several Star Trek films. ...

Beaming down, the team finds themselves in a seemingly deserted cavern. Deanna senses life though, human life forces, and she can empathically feel that the humans are terrified. An analysis of the cavern's Triolic emanations indicates that the cavern is indeed inhabited, but that the occupants are out of phase with the normal time continuum by a fraction of a second, while the away team occupies the same physical space, they cannot see the aliens since they are in a different time. Data and Geordi realize that with a very sensitive phase discriminator a contained subspace force field could bridge the time gap. Data points out that he has such a phase discriminator built into his positronic compiler. Reluctantly, Picard gives him permission to join the away team.

Once on the planet, Data explains to the away team that he has modified the communications system by linking it with the discriminator, so that the other members of the team will be able to hear him over the comm system once he activates the force field. As he adjusts the force field projector he brought with him, he vanishes. His voice continues to come over the communicators however, and he advises the rest of the team that he can now see the aliens and describes them as small, humanoid, silvery, and possessing an orifice on what would be the forehead. He adds that they do not seem to be aware of, or at least acknowledge, his presence. He states that they are surrounding some kind of apparatus which is emitting energy filaments which the aliens ingest through the orifice, perhaps some kind of nourishment. There apparently are hundreds, or perhaps thousands of the energy filaments in the top of the apparatus, it seems to be some type of storage device for them. He also notices an ophidian (snake) nearby which is restrained by a force field. Two of the aliens approach the ophidian and release the field, at which point a loud noise comes over the comm link. Data's voice suddenly becomes indistinct and distorted, he only has time to say something about a “temporal disturbance of mass proportions” and “the time space continuum”, and that he is “caught in the after effect”. Suddenly the rest of the team see a bright flash and the subspace field generator Data was using appears on top of a rock nearby. Riker sombrely reports to Picard that they have lost Data.

Data finds himself lying on a cobblestoned street. He sits up and looks around to find himself in 1893 San Francisco. He begins looking for the aliens and their snake, meeting up in the process with an old bum who offers him some tips on the fine art of panhandling. Having no funds, and realizing that he needs lodging, he approaches a friendly seeming hotel bell hop and inquires about employment. The man can't help him, but greets another passerby and inquires about his luck playing poker, and at Data's request tells him about the location of the game. Joining the game, Data quickly cleans out the other players, who he later finds out were card sharks. With his winnings he rents a room at the hotel. He tells the bell hop that he is an inventor, and asks him if he can procure some needed items. Outside, the old deadbeat whom Data had spoken with earlier is accosted by a man and woman dressed as doctor and nurse, when he asks them for help a beam comes from the doctor's satchel and leaves him slumped dead in the alley.

Aboard the Enterprise, although Riker and the rest of the crew are very emotional about Data's disappearance, Picard points out that they can't let recovering Data become their priority. Riker responds that since Data may now know more about the situation than they do, finding him may help more than anything else in the resolution of the situation. Picard observes that while he hopes this will be the case, it is vitally important that they determine the extent of the threat to Earth, and orders La Forge to attempt to produce an equivalent to Data's phase discriminator chip so that they can attempt to make contact with the aliens. Geordi says that while there is nothing even close to what Data has aboard ship, perhaps he can build one, and sets out to do so. Ten-Forward hostess Guinan, contacts Picard and requests a meeting, she tells Picard, that he must join the away team he's sending to the planet. He finds this strange and attempts to question her, but she refuses to tell him much more, other than enigmatically saying that the two of them will never meet if he doesn't go. Guinan is a character in the Star Trek universe played by Whoopi Goldberg. ...

In San Francisco Data has constructed an apparatus with which he can monitor temporal distortions in an effort to track the aliens. Wondering what the device is, the hotel bell hop ventures that it is perhaps a new engine for horseless carriages. Telling him that it is, Data looks at the paper the bell hop brought and is amazed to see a picture of Guinan there, apparently she is appearing as a prominent guest at a literary reception.

At the reception Guinan is speaking to another of the guests, Samuel L. Clemens (Mark Twain). Data arrives and attempts to speak to Guinan, but finds that she doesn't recognize him. Data then realizes that he has made an error, Guinan hasn't followed him back from the future as he assumed, but he has met an earlier temporal incarnation of her. (Guinan is a member of the extremely long-lived El-Aurian species). Data tells her that he is from the future and briefly describes the situation, unfortunately an eavesdropping Clemens overhears everything. Samuel Langhorne Clemens (November 30, 1835 - April 21, 1910), better known by his pen name Mark Twain, was a famous and popular American humorist, writer and lecturer. ... Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910),[1] better known by the pen name Mark Twain, was an American humorist, satirist, writer, and lecturer. ... El Aurians (sometimes known as The Race of Listeners) are a humanoid race of from the science fiction television show Star Trek. ...

On Devida II the away team which includes Captain Picard uses the device Geordi built to phase shift into the alien's time continuum. Dr. Crusher quickly discovers that the filaments originally observed by Data are organic, possibly a life form. Troi corrects her that they are not alive, what she had mistakenly earlier thought was life was just an “echo” of the last moments of life. Dr. Beverly Crusher, played by actress Gates McFadden, was a character on the TV show Star Trek: The Next Generation and the films which followed. ...

All at once a bright doorway of light appears, and two aliens come through, bearing more of the filaments for the other aliens to ingest. After depositing the new filaments into the apparatus the creatures start to leave again, and as they do the Enterprise team follows them through the glowing gateway.

Part 2

In the 19th century, the crew is reunited with Data. In a struggle with the time-traveling aliens, Data’s head is quite literally blown off, and one of the aliens escapes back into the 24th century, followed by the Enterprise crew—and by Samuel Clemens. Having brought the headless Data back with them, the crew decides to attach the 500-year-old head from the cavern.

Back in the past, Picard is tending to Guinan, who was injured during the struggle. In a conversation with the alien who remained behind, Picard learns that if the Enterprise tries to destroy the aliens’ base of operations in the 24th century, the aliens’ power will be amplified. With no other way to warn them, Picard uses an iron filing to insert a binary message into Data’s head. In the future, the crew successfully attaches the 500-year-old head, is made aware of the message, and avoids destroying the aliens’ base in a way that will be counterproductive. Commander Riker decides to use the aliens’ time-travelling device to retrieve Captain Picard from the 19th century but discovers that only one person will be able to return. Headquarters (HQ) denotes the location where most, if not all, of the important functions of an organization are concentrated. ...

Upon learning this, Clemens states that he is the logical choice to travel back in time, stay there, and give the device to Picard so that he can return to the future. When Picard says that he wish he had the time to get to know Clemens better, Clemens tells him to read his books, that who he was is in these books. Picard returns to the future, and the Enterprise destroys the aliens’ base of operations.

Back in the 19th century, Clemens is having the injured Guinan taken out of the cave. He decides to leave his watch behind in the cave. The show ends with a shot of Data’s severed head, lying on the floor of the cave.

Trivia

• Marc Alaimo who played Cardassian Gul Macet in the TNG episode "The Wounded", and later Gul Dukat in Star Trek: Deep Space Nine, played the role of Frederick LaRouque in this episode. This was Alaimo's first appearance on a Star Trek-related television series as a human.
• The character of Mark Twain asked Deanna Troi if the Enterprise encountered Halley's Comet, which not only appeared the year of Twain's birth, but the year of his death as well.
• Mark Twain is the first character in The Next Generation to use the phrase "Star Trek".
• The hotel bellhop, the character of Jack London, is implied to be the American author who later wrote The Call of the Wild among other works.
• Data's readily-believed claim to be "from France" as explanation of his appearance strongly parallels the Saturday Night Live sketch "Coneheads".
• Data uses the informal contraction gonna when he asks "What do you think it is gonna be?"
• When Picard claims to be earthquake-proofing lanterns to cover his real actions, a local scoffs at the idea, suggesting that earthquakes are no concern. This foreshadows the catastrophic 1906 San Francisco Earthquake, the worst in US history.
• Some of the events in Time's Arrow are similar to those in the TOS episode The City on the Edge of Forever. For example, both Spock and Data time travel to the past, and both build machines which locate other members of the Enterprise crew.

Marc Alaimo is an American actor. ... For the Star Trek: The Next Generation episode, see The Wounded (TNG episode). ... Space station Star Trek: Deep Space Nine (ST:DS9 or STDS9 or DS9 for short) is a science fiction television series produced by Paramount and set in the Star Trek universe. ... The current Star Trek franchise logo Star Trek is an American science fiction entertainment series. ... Comet Halley, officially designated 1P/Halley, more generally known as Halleys Comet after Edmond Halley, is a comet that can be seen every 75-76 years. ... Jack London (January 12, 1876 – November 22, 1916),[1][2][3] was an American author who wrote The Call of the Wild and over fifty other books. ... For other uses, see Call of the Wild (disambiguation) The Call of the Wild is a novella by American writer Jack London. ... Saturday Night Live (SNL) is a weekly late night 90-minute American comedy-variety show based in New York City which has been broadcast live by NBC on Saturday nights since October 11, 1975. ... The Coneheads was originally a sketch on Saturday Night Live which starred Dan Aykroyd as father Beldar, Jane Curtin as mother Prymaat and Kristen Kilpatrick as daughter (Connie). The Coneheads were an alien family, natives of the planet Remulak, who found themselves stranded on Earth. ... Going-To Future is a term used to describe an English sentence structure referring to the future, making use of the verb phrase be going to. ... Arnold Genthes famous photograph of San Francisco following the earthquake, looking toward the fire on Sacramento Street A statue of Louis Agassiz, a Swiss-American geologist, after the 1906 San Francisco earthquake, on the campus of Stanford University. ... The starship Enterprise as it appeared on Star Trek Star Trek is a culturally significant science fiction television series created by Gene Roddenberry in the 1960s. ... The City on the Edge of Forever is a first season episode of Star Trek: The Original Series. ... The current Star Trek franchise logo Star Trek is an American science fiction entertainment series. ... The starship Enterprise as it appeared on Star Trek Star Trek is a culturally significant science fiction television series created by Gene Roddenberry in the 1960s. ... The Naked Time is an episode of Star Trek: The Original Series first broadcast on 29 September 1966 and repeated on 27 April 1967. ... Tomorrow Is Yesterday is a first season episode of Star Trek: The Original Series. ... The City on the Edge of Forever is the penultimate episode of the first season of Star Trek: The Original Series. ... Assignment: Earth is a second season episode of Star Trek: The Original Series. ... All Our Yesterdays is a third season episode of Star Trek: The Original Series, first broadcast March 14, 1969 and repeated on August 5, 1969. ... Star Trek IV: The Voyage Home (Paramount Pictures, 1986; see also 1986 in film) is the fourth feature film based on the popular Star Trek science fiction television series. ... Star Trek: The Animated Series is an animated science fiction television series set in the Star Trek universe. ... Yesteryear is an episode of Star Trek: The Animated Series. ... The title as it appeared in most episodes opening credits. ... Time Squared redirects here. ... Yesterdays Enterprise is an episode of the 3rd season of Star Trek: The Next Generation. ... Captains Holiday is the title of an episode from the third season of Star Trek: The Next Generation. ... A Matter of Time is the title of an episode of Star Trek: The Next Generation from the series fifth season. ... Cause and Effect is considered by many fans to be one of the best episodes of the series Star Trek: The Next Generation. ... Tapestry is an episode of season six of Star Trek: The Next Generation. ... “Timescape” is an episode from the sixth season of the television series Star Trek: The Next Generation. ... Parallels is an episode of Star Trek: The Next Generation directed by Robert Weimer from a script by Brannon Braga. ... Firstborn is a seventh-season Star Trek: The Next Generation episode. ... All Good Things. ... Star Trek: First Contact (Paramount Pictures, 1996; see also 1996 in film), is the eighth feature film based on the popular Star Trek science fiction television series. ... Space station Star Trek: Deep Space Nine (ST:DS9 or STDS9 or DS9 for short) is a science fiction television series produced by Paramount and set in the Star Trek universe. ... Two 21st century policeman patrol the Sanctuary District of San Francisco Past Tense was a two part episode of Star Trek: Deep Space Nine in which the crew of the USS Defiant is thrown back in time to the mid 21st century on Earth. ... Visionary is the title of a Star Trek: Deep Space Nine episode, from the third season. ... The Visitor is the title of the third episode of the fourth season of the television series Star Trek: Deep Space Nine. ... Little Green Men is the title of an episode from the fourth season of the television series Star Trek: Deep Space Nine. ... Accession is an episode of the fourth season of Star Trek: Deep Space 9. ... Trials and Tribble-ations is a fifth season episode of Star Trek: Deep Space Nine that was written as a tribute to the original series of Star Trek. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Wrongs Darker than Death or Night is a sixth-season episode of Star Trek: Deep Space Nine. ... Times Orphan is a sixth-season episode of Star Trek: Deep Space Nine. ... The starship Voyager (NCC-74656), an Intrepid-class starship. ... Time and Again is the fourth episode of the television series Star Trek: Voyager. ... Eye of the Needle is the seventh episode of the television series Star Trek: Voyager. ... Non Sequitur is the 21st episode of Star Trek: Voyager, the fifth episode in the second season. ... Futures End is an episode from the third season of Star Trek: Voyager. ... Before and After is an episode of Star Trek: Voyager, the 21st episode of the third series. ... Year of Hell is a two-part episode of the television series Star Trek: Voyager in the series 4th season. ... Timeless, the sixth episode of the fifth season of Star Trek: Voyager, was also the series 100th episode. ... Relativity is a fifth season episode of Star Trek: Voyager, first broadcast on May 12, 1999. ... Spoiler warning: Episode begins with Voyager detecting a incoming ship, with much older Kes on board. ... For the Deep Space Nine episode, see Shattered Mirror (DS9 episode). ... Endgame is the title of the final episode in the Star Trek spin off series, Star Trek: Voyager. ... The starship Enterprise (NX-01) Star Trek: Enterprise is a science fiction television series set in the Star Trek universe. ... Shockwave is a two-part episode of the television series Star Trek: Enterprise. ... Future Tense is the 42nd episode (production #216) of the television series Star Trek: Enterprise. ... Twilight is an episode of the television series Star Trek: Enterprise that was broadcast midway through the shows third season. ... Carpenter Street is the title of a Star Trek: Enterprise television episode from season three. ... E² is the title of an episode from the third season of the television series Star Trek: Enterprise. ... Zero Hour is the title of an episode of Star Trek: Enterprise; it was the season finale for season three. ... Storm Front is a two-part episode (the 77th and 78th episodes) of the television series Star Trek: Enterprise, the first of the fourth season. ...

Quotes

• "Remember the first time we met?"
  

"Of Course"
"Don't be so sure. I mean ... if you don't go on this mission...we'll never meet."
-- Guinan, to Picard.

• Guinan: "I'll see you in 500 years, Picard." Picard: "And I'll see you in a few minutes."

• Troi quoting Data's definition of friendship to Riker: "As I experience certain sensory input patterns my mental pathways become accustomed to them. The inputs are eventually anticipated, even missed when absent."

External links

• Time's Arrow, Part I article at Memory Alpha, a Star Trek wiki.
• Time's Arrow, Part II article at Memory Alpha, a Star Trek wiki.
• Time's Arrow (TNG episode) at StarTrek.com (Part 1)
• Time's Arrow (TNG episode) at StarTrek.com (Part 2)