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.
Cast
George Peppard
Pete
Mary Tyler Moore
Liz
Dom DeLuise
J. Gardner Monroe
John McMartin
The Mayor
Nathaniel Frey
Conrad
Charles Lane
Dr. Shapiro
Jeanne Arnold
Gertrude
George Furth
Murgatroyd
Morty Gunty
Sgt. Gunty
Joe Ponazecki
Officer Ponazecki
Frank Campanella
Captain Wallace
Susan Saint James
Aida
Don Stroud
Barney
Nat Polen
Unknown
Thelma Ritter
Mrs. Schwartz
Franklin Cover
Medical Expert
Cleavon Little
Phil
James Noble
Board Member
Paul Dooley
Vic
Salem Ludwig
Witter
Crew
George Seaton
Director, Screenstory, Producer
Robert Pirosh
Screenplay
Vincent McHugh
Novel
Alma Macrorie
Editor
Ernesto Caparrós
Cinematography
Donald Roberts
Assistant Director
Gordon Cornell Layne
Associate Producer
Sheryl Deauville
Assistant Costume Designer
Edith Head
Costume Design
Colleen Callaghan
Key Hair Stylist
Larry Germain
Hairstylist
Bud Westmore
Makeup Supervisor
Jim Shields
Sound
Waldon O. Watson
Sound
Frank De Vol
Original Music Composer
Joseph Gershenson
Music Supervisor
Dorcy Howard
Set Decoration
John McCarthy Jr.
Set Decoration
Henry Bumstead
Art Direction
Alexander Golitzen
Art Direction
