I know that there were various other choices for Pike or Kirk in the pilot stage....Lloyd Bridges, Jack Lord.
The rumor of Martin Landau replacing Nimoy at some point if he didn't come back.
Robert Ryan almost playing decker in Doomsday
John Drew Barrymore not showing up to play Lazarus.
Does anybody here know of other actors who were up for regulars or guest parts that ultimately didn't?
Lot of great character actors from the 60s must have auditioned but for whatever reason didn't get cast.