At the very first episodes of The Carol Burnett Show in 1967, the hostess played “Mrs. Invisible Man”, a mother whose baby was invisible, just like her husband. The pharmacy then gave a tonic to make the infant visible to the world, her husband insisted on trying it out first. When it worked on the infant, her husband comes out of the bedroom and he was Spock (Leonard Nimoy) from the original Star Trek series.
The most absurd we ever saw Spock was in this 1967 cameo on The Carol Burnett Show!