My Sister, Benedict Arnold - S3-E5
Question: In this episode Marcia dates Greg's rival Warren Mulany. I noticed in the credits the actor's name was Gary Rist, is he related to Robbie Rist who played Oliver?
Chosen answer: Since Robbie Rist has no brothers, the answer would have to be no.
How about cousins with their fathers being brothers? I'd have to say... May be related? Yep.
Answer: Robbie Rist told me personally they are not related at all.