There’s a TZ episode where a man gives people at a bar something and whatever he gives them ends up being important or something like that. Arlene Martel is a girl at the bar. As you said before, the list of actors who did both shows is huge. It’s funny how I didn’t even think of Peter Falk until it was mentioned above. I just ran through the list of killers and forgot about the star.
Don Keefer was the coroner in "The Most Crucial Game" and "Death Lends A Hand," and also in one of the most famous TWILIGHT ZONE'S. He was the man who becomes a jack in the box in It's A Good Life."