The first interracial kiss on American network television was in the "Star Trek" episode entitled "Plato's Stepchildren," which aired on November 22, 1968, when Captain Kirk (William Shatner) kissed Lieutenant Uhura (Nichelle Nichols). Some stations in the South (U.S.) originally refused to air the episode.
The famous "I Want to Believe" UFO poster from Fox Mulder's office in the "X-Files" continually had to be replaced as copies kept disappearing from the set. The poster on display at the Hollywood Entertainment Museum in Los Angeles is reportedly one of the last available copies of the original set-used posters.
In the final scene of the 1979-80 season of Dallas, J.R. Ewing hears a noise outside his office, walks out to the corridor to look, and is shot twice by an unseen assailant. The episode, titled "A House Divided", was broadcast on March 21, 1980, and viewers would have to wait until the November episode "Who Done It" to learn that the shooter was Kristin Shepard, J.R.'s mistress and his wife's sister.
The Andy Griffith Show is actually a spin off! Sheriff Andy Taylor first appeared on an episode of The Danny Thomas Show in which Danny is arrested by Sheriff Taylor for failing to come to a complete stop at a stop sign in the town of Mayberry. The character was such a hit that Andy soon got his own show.