7x19 - Perfect Strangers

When Balki takes Larry's ""Wheat"" play-script to Lydia's theater, Larry goes down to see the cast. But when the director tries to change the lines, Larry won't let him, so they all quit. But Larry insists that they keep the show by casting him with Balki, Lydia, Jennifer, and Mary Anne, but they've never acted before and make a mess of it.