Password

... with Jeopardy. They are the two "pure" game shows in the history of television. No gimmicks and very little luck were involved to succeed at this game. What contestants needed was a good command of language and quick wits to come up with clues and guess the password.

Stars like Elizabeth Montgomery, Carol Burnette, Tony Randall, and Peter Lawford excelled at the game, with Lawford owning the record "Lightning Round", getting 5 passwords in 12 seconds.

The show was also notable as the venue where Alan Ludden first met Betty White. A few years later they married and remained so until his death eighteen years later, in 1982.

I was fortunate to see the show during the summers as a kid, and watched it again on the Game Show Network. Unfortunately, many episodes were lost when the network reused the tapes for Family Feud!