What shows can you think of?

Law & Order: Trial by Jury (Bebe Neuwirth, Jerry Orbach, Fred Thompson)
Friends from College (Keegan-Michael Key, Fred Savage, Cobie Smulders)

Married With Children

It Takes Two (https://www.youtube.com/watch?v=p_ZfpSmHD7s), starring Richard Crenna, Patty Duke, Helen Hunt, Anthony Edwards, Billie Bird, (and the set from The Golden Girls).

The Beverly Hillbillies and Gilligan's Island.

Mary - Mary Tyler Moore, David Letterman, Dick Shawn, Michael Keaton, James Hampton, Swoosie Kurtz, and Merrill Markoe

I thought there was one unknown in the cast photos and she turned out to be Merrill Markoe. She was unknown then, but later she was a very important writer on Letterman's late night talk show on NBC.