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Jack (John Ritter), Janet (Joyce DeWitt), and Chrissy (Suzanne Somers) are planning a big party. Mr. Roper (Norman Fell) is worried that the roomies will make too much noise -- and besides, he's in the mood to play a practical joke. Thus it is that Roper hangs a "The Party is Canceled" sign on the trio's apartment. Ha ha ha ha! But "ha ha ha ha!" becomes "boo hoo hoo hoo" when Mrs. Roper (Audra Lindley), fed up with her husband's behavior, walks out on him. This Three's Company entry is based on an episode of the series' British sitcom prototype Man About the House.