| Person | Type | Job | Role(s) |
|---|---|---|---|
 Anthony Hinds | Crew | Production | Producer |
J. Elder Wills | Crew | Art | Art Direction |
James Bernard | Crew | Sound | Original Music Composer |
James Needs | Crew | Editing | Editor |
Les Bowie | Crew | Crew | Special Effects |
Molly Arbuthnot | Crew | Costume & Make-Up | Wardrobe Supervisor |
 Nigel Kneale | Crew | Writing | Teleplay |
Philip Leakey | Crew | Costume & Make-Up | Makeup Artist |
Richard H. Landau | Crew | Writing | Screenplay |
 Val Guest | Crew | Writing | Screenplay, Director |
Walter J. Harvey | Crew | Camera | Director of Photography |
John Hollingsworth | Crew | Sound | Music Director |
Monica Hustler | Crew | Costume & Make-Up | Hairstylist |
T.S. Lyndon-Haynes | Crew | Production | Production Manager |
H. C. Pearson | Crew | Sound | Sound Recordist |
Bill Shore | Crew | Directing | Assistant Director |
Arthur Gross | Cast | Actor | TV Show Floor Director (uncredited) |
Arthur Lovegrove | Cast | Actor | Sgt. Bromley |
 Barry Lowe | Cast | Actor | Nurse Tucker (uncredited) |
 Bartlett Mullins | Cast | Actor | Zookeeper (uncredited) |
 Basil Dignam | Cast | Actor | Sir Lionel Dean (uncredited) |
 Brian Donlevy | Cast | Actor | Bernard Quatermass |
 David King-Wood | Cast | Actor | Gordon Briscoe |
 Donald Gray | Cast | Actor | TV Program Announcer (uncredited) |
 Gordon Jackson | Cast | Actor | BBC TV producer |
 Harold Lang | Cast | Actor | Christie |
Henry B. Longhurst | Cast | Actor | George (uncredited) |
 Jack Warner | Cast | Actor | Inspector Lomax |
Jane Aird | Cast | Mrs. Lomax (uncredited) | |
 Jane Asher | Cast | Actress | Little Girl (uncredited) |
 John Kerr | Cast | Actor | Photo Lab Technician (uncredited) |
 John Wynn | Cast | Actor | Det. Sgt. Best (uncredited) |
 Lionel Jeffries | Cast | Actor | Blake |
Margaret Anderson | Cast | Actress | Maggie (uncredited) |
 Margia Dean | Cast | Actress | Judith Carroon |
 Marianne Stone | Cast | Actress | Central Clinic Nurse (uncredited) |
 Maurice Kaufmann | Cast | Actor | Marsh (uncredited) |
Mayne Lynton | Cast | Actor | Zoo Superintendent (uncredited) |
Michael Godfrey | Cast | Actor | Crash Site Fireman (uncredited) |
Molly Glessing | Cast | Actress | Mother at Zoo (uncredited) |
 Richard Wordsworth | Cast | Actor | Victor Carroon |
 Sam Kydd | Cast | Actor | Police Sergeant Questioning Rosie |
 Stanley Van Beers | Cast | Actor | Ludwig Reichenheim (uncredited) |
 Thora Hird | Cast | Actress | Rosie Wrigley |
Eric Corrie | Cast | Actor | Maggie's Boyfriend (uncredited) |
 Toke Townley | Cast | Actor | The Chemist (uncredited) |
Gron Davies | Cast | Charles Greene (uncredited) | |
Ernest Hare | Cast | Actor | Crash Site Fire Chief (uncredited) |
 James Drake | Cast | Sound Engineer (uncredited) | |
| Person | Type | Job | Role(s) |
