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Janet (Joyce DeWitt) panics when she sees a mouse in her bedroom. Generous Jack (John Ritter) offers to switch rooms with her. Can Jack be making this gesture out of the goodness of his heart? Well, not exactly -- if Janet moves into his room, he'll be all that much closer to the toothsome Chrissy (Suzanne Somers). "The Best Laid Plans" is adapted from "Of Mice and Friends," an episode of Three's Company's British sitcom prototype Man About the House.