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Future WKRP in Cincinnati co-star Howard Hesseman reprises his role as Mr. Plager, the gay, culturally inclined member of Bob's therapy group. Urged on by Bob and the other patients, Plager writes, produces, and directs a play. Unfortunately, Plager's masterpiece, though ostensibly set during WWI, is a thinly disguised carbon copy of the group's therapy sessions, replete with characters based on Mr. Carlin, Mr. Petersen, Mrs. Bakerman -- and Bob himself. (For the record, these "faux" roles are filled by Jerry Devine, Lou Cutell, Amzie Strickland, and Frank Ashmore, respectively). Scripted by Andrew Smith, "Group on a Hot Tin Roof" was originally scheduled to air in February or March of 1978, but was moved up to January 28, due to Bob Newhart's absence from several other like-vintage episodes.