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As usual, the Petries' neighbor Jerry Helper (Jerry Paris) is ribbing Laura (Mary Tyler Moore). This time, jokester Jerry is planting suggestions that it isn't all "strictly business" between Rob (Dick Van Dyke) and actress Valerie Blake (Joan O'Brien), who is guesting on "The Alan Brady Show." Of course, Laura would never suspect her husband of any hanky-panky -- until Rob begins spending every evening in rehearsal with the alluring Valerie.