April 17 - British journalist John McCarthy kidnapped in Beirut (released in August 1991) - three others are found dead, Revolutionary Cells claims responsibility in retaliation for the US bombing of Libya
April 26 - In the Ukraine, one of the reactors at the Chornobyl (Chernobyl) nuclear plant explodes creating the worlds worst nuclear disaster. 31 are killed directly by the incident, many thousands more were exposed to significant amounts of radioactive material, vast territories in Ukraine and Belarus rendered uninhabitable.
April 27 - Captain Midnight (John R. MacDougall) hijacks HBO's satellite and transmits his own message to HBO viewers.
November 3 - Lebanese magazine Ash-Shiraa reports that the United States has been selling weapons to Iran in secret in order to secure the release of seven American hostages held by pro-Iranian groups in Lebanon.
January - A Vicks Formula 44 ad premieres, starring Peter Bergman from All My Children, in which he told the viewing audience "I'm not a doctor, but I play one on TV."
July 18 - A tornado is broadcast live on KARE TV in Minnesota when the station's helicopter pilot makes a chance encounter.
October 9 - The FOX Broadcasting Company becomes the United States' fourth television network with a broadcast of "The Late Show Starring Joan Rivers".