I'm a big sci-fi fan, and even before "Star Trek" aired, "Lost In Space" debuted on CBS-TV on this day in 1965. The show later sparked a film version in 1998, but the original TV series was much more memorable, in my opinion.

Just to refresh your memory, here's more about "Lost In Space", according to Wikipedia:

"Lost in Space is an American science fiction television series created and produced by Irwin Allen, filmed by 20th Century Fox Television, and broadcast on CBS. The show ran for three seasons, with 83 episodes airing between September 15, 1965, and March 6, 1968. The first television season was filmed in black and white, but the remainders were filmed in color.

Though the original television series concept centered on the Robinson family, many later story lines focused primarily on Dr. Zachary Smith, played by Jonathan Harris. Originally written as an utterly evil but extremely incompetent would-be saboteur, Smith gradually becomes the troublesome, self-centered, incompetent foil who provides the comic relief for the show and causes most of the episodic conflict and misadventures."

Watch this promotional video showing network TV station affiliates what "Lost In Space" was all about before it aired on this day in 1965: