Sceneggiatura

• Elmer Rice — novel
• Jerome Epstein — writer

Regia

• Jerome Epstein — director
• Ray Corbett — assistant director

Costumi e trucco

• Alan Brownie — makeup artist
• Stephanie Kaye — costume design
• Gabriella Falk — costume design
• Ruth Knight — costume supervisor

Sonoro

• Roy Norman — sound editor
• John Blunt — sound mixer
• Bert Coot — sound mixer
• Charles R. Bowers — sound editor
• Lambert Williamson — music
• Mike Leander — music
• Brian Marshall — sound recordist

Scenografia

• John Lageu — assistant art director
• Michael Pittel — art department assistant
• Jack Shampan — art direction

Fotografia

• Ronnie Fox Rogers — camera operator
• Walter Lassally — director of photography

Produzione

• Jerome Epstein — producer
• L. C. Rudkin — production manager

Montaggio

• Gerry Hambling — editor
• Brian Sinclair — editor

Cast

• Milo O'Shea — Mr. Zero
• Phyllis Diller — Mrs. Zero
• Billie Whitelaw — Daisy Devore
• Sydney Chaplin — Lieutenant Charles
• Julian Glover — Shrdlu
• Raymond Huntley — Smithers
• Phil Brown — Don
• Paddie O'Neil — Mabel
• Libby Morris — Ethel
• Hugh McDermott — Harry
• Bill Nagy — Lawyer
• Carol Cleveland — Judy
• Bruce Boa — Detective
• Kenny Damon — Joe
• John Brandon — First cell jailer
• Hal Galili — Second cell jailer
• Tony Caunter — Third cell jailer
• Bill Hutchinson — Judy's lover
• Helen Elliot — Second apartment girl
• C. Denier Warren — Jury foreman
• Tommy Duggan — Judge
• Gordon Sterne — Yard guard
• Lola Lloyd — Coffee girl
• Nicholas Stuart — District Attorney
• George Margo — Gateman
• Allan Surtees — Apartment tenant
• John Bloomfield — Apartment tenant
• Janet Brown — Fat Woman