A new infection that simply makes people feel happy is treated as a threat by the authorities while its "victims" work to spread it to others.

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Main Cast: George Peppard, Mary Tyler Moore, Dom DeLuise, John McMartin, Nathaniel Frey, Charles Lane, Jeanne Arnold, George Furth, Morty Gunty, Joe Ponazecki

Director: George Seaton

Writer: Robert Pirosh

Editor: Alma Macrorie

Cinematographer: Ernesto Caparrós

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