This is a complete listing of episodes from the Nickelodeon animated television series The Wild Thornberrys. Nickelodeon (Nick for short) is an American cable TV network for children. ... An animated series or cartoon series is a television series produced by means of animation. ... The Wild Thornberrys was an American animated television series that aired from September 1, 1998 until June 11, 2004 on Nickelodeon. ...

Season 1: 1998-1999

1. Flood Warning (9/1/1998)
2. Dinner With Darwin (9/3/1998)
3. Bad Company (9/8/1998)
4. Gold Fever (9/10/1998)
5. Matadi or Bust (9/15/1998)
6. Temple of Eliza (9/17/1998)
7. Vacant Lot (9/22/1998)
8. Only Child (10/1/1998)
9. Iron Curtain (10/6/1998)
10. Valley Girls (10/13/1998)
11. Naimina Enkiyio (10/22/1998)
12. Blood Sisters (10/27/1998)
13. Eliza-cology (11/5/1998)
14. Flight of the Donnie (11/17/1998)
15. Lost and Foundation (3/16/1999)
16. Nigel Knows Best (3/18/1999)
17. The Great Bangaboo (3/23/1999
18. Rumble in the Jungle 3/25/1999)
19. The Dragon and the Professor (3/30/1999)
20. Born to Be Wild (4/1/1999)

Season 2: 1999-2000

1. Rebel Without a Trunk (8/16/1999)
2. Pal Joey (8/17/1999)
3. Rain Dance (8/18/1999)
4. Darwin Plays the Palace (8/19/1999)
5. Stick Your Neck Out (8/23/1999)
6. No Laughing Matter (8/24/1999)
7. Chimp Off the Old Block (8/25/1999)
8. Koality and Kuantity (8/26/1999)
9. Chew if by Sea (8/30/1999)
10. Clash of the Teutons (8/31/1999)
11. You Ain't Seen Nothin', Yeti (9/1/1999)
12. On the Right Track (9/2/1999)
13. Polar Opposites (9/6/1999)
14. Two's Company (9/7/1999)
15. Show Me the Bunny (9/13/1999)
16. Reef Grief (9/14/1999)
17. Thornberry Island (9/15/1999)
18. Dances With Dingoes (9/16/1999)
19. Tamper-Proof Seal (10/19/1999)
20. You Otter Know (10/20/1999)
21. Have Yourself A Thornberry Little Christmas (11/29/1999)
22. Luck Be an Aye-Aye (2/15/2000)
23. The Kung and I (2/16/2000)
24. Dear Diary (2/17/2000)
25. Black and White and Mom All Over (2/21/2000)
26. A Tiger by the Tail (2/22/2000)
27. Forget Me Not (2/24/2000)
28. Song for Eliza (2/25/2000)
29. Gift of Gab (2/26/2000)
30. Bogged Down (3/6/2000)
31. Monkey See, Monkey Don't (3/6/2000)
32. A Shaky Foundation (3/13/2000)
33. Where the Gauchos Roam (3/13/2000)
34. Cheetahs Never Prosper (3/20/2000)
35. Gobi Yourself (3/20/2000)
36. Every Little Bit Alps (3/27/2000)
37. Pack Of Thornberrys (3/27/2000)

Season 3: 2000-2001

1. Dragon Me Along (9/12/2000)
2. Time Flies (9/19/2000)
3. Horse Sense 9/26/2000
4. Tyler Tucker, I Presume (10/2/2000)
5. Critical Masai (10/3/2000)
6. Queen of Denial (10/4/2000)
7. Island Trade (10/5/2000)
8. Birthday Quake (10/6/2000)
9. The Legend of Ha Long Bay (10/10/2000)
10. Spirited Away (10/28/2000)
11. Family Tradition (11/22/2000)
12. Happy Old Year (12/27/2000)
13. Happy Campers (12/30/2000)
14. All Work and No Play (1/12/2001)
15. New Territory (1/12/2001)
16. Operation Valentine (2/14/2001)
17. Hello, Dolphin! (2/19/2001)
18. April Fool's Day (4/1/2001)
19. Gem of a Mom (5/10/2001)
20. The Anniversary (5/14/2001)

Season 4: 2001-2004

1. The Origin of Donnie (1)¹ (8/18/2001)
2. The Origin of Donnie (2)¹ (8/18/2001)
3. The Origin of Donnie (3)¹ (8/18/2001)
4. The Origin of Donnie (4)¹ (8/18/2001)
5. The Trouble With Darwin (10/31/2001)
6. Hot Air (6/1/2002)
7. The Wild Snob-Berry (2/3/2003)
8. Ice Follies (2/4/2003)
9. Fool's Gold (2/5/2003)
10. Clash and Learn (2/6/2003)
11. Sir Nigel (1) (3/30/2003)
12. Sir Nigel (2) (3/30/2003)
13. Look Who's Squawking (4/4/2003)
14. Eliza Unplugged (6/11/2004) ²

¹ -- In the US, "The Origin of Donnie" was seen as a TV movie on Nickelodeon. However, the film only runs for 66 minutes (without commercials), while all 4 parts of the episode runs 88 minutes total (again, without ads). The 4-part version was never seen in the US, but was seen overseas.