7th Heaven - I Thought You Were in Ruthie's Room...
In the episode called "12 angry people" when Ruthie is punished for cutting her friend Sarah's hair, Mary Lucy & Ruthie are all in Ruthie's room. Mary & Lucy think Ruthie cut her own hair because she is wearing a hat, but she surprises them when she takes off the hat to show she didn't really cut her hair. Annie walks in and exclaims "Why are you in Lucy's room? I thought I told her no visitors!" But they are actually in Ruthie's room & RUTHIE was told not to have visitors, not Lucy. Lucy and Mary share the attic.