A whole thread dedicated to TOS trivia....if it survives. Here goes nothing.
What background actor played 2 separate aliens in the same episode? Hint: There was no heavy makeup that disguised his whole face. That's 2 hints; it was a male actor.
What background actor played 2 separate aliens in the same episode? Hint: There was no heavy makeup that disguised his whole face. That's 2 hints; it was a male actor.