Jeopardy (partially found unaired pilot of NBC game show; 1964)
Jeopardy is a game show that premiered on NBC on March 30th, 1964 and ended it's run on January 3rd, 1975, it returned briefly returned on NBC October 2nd, 1978 and ended on March 2nd, 1979 and returned again but in syndication on September 10th, 1984 and has been airing ever since. It was created by talk show host Merv Griffin and was hosted by Art Fleming for the NBC series' and later by Alex Trebek for the Syndicated series. On March 5th, 1964 a test pilot  was recorded to pitch the series to NBC. The contestants were Grace, Jerre, and Dolores (last names are unknown) and the winner of the pilot is unknown. Art Fleming hosted the pilot and Don Pardo (who also announced the first NBC series) announces the pilot as well.
The whereabouts of the pilot were unknown until the syndicated version's 4000th episode on May 15th, 2002 where Alex (the version's host) described the original NBC series, because most of the series' episodes were destroyed, a 24 second snippet of the pilot was shown and it was just the beginning of the first round. In 2005, Sony released a DVD with 5 episodes of the syndicated series and the special features featured interviews with the crew and included 3 more clips from the pilot. First one is Art Fleming describing the show's premise, second one is of Art Fleming walking onto the set and the third one is of the shows logo from the intro. The rest of the pilot remains lost.