Prof. Bernard Quatermass
Victor Carroon
Dr. Gordon Briscoe
Inspector Lomax
Judith Carroon
Marsh
Detective Sergeant Best
Christie
Blake
Rosie Wrigley
Police Sergeant Questioning Rosie
BBC TV producer
Little Girl (uncredited)
The Chemist (uncredited)
Maggie (uncredited)
Maggie's Boyfriend (uncredited)
George, Maggie's father (uncredited)
Crash Site Fire Chief (uncredited)
Crash Site Fireman (uncredited)
Central Clinic Nurse (uncredited)
Photo Lab Technician (uncredited)
Zookeeper (uncredited)
Zoo Superintendent (uncredited)
Nurse Tucker (uncredited)
Mrs. Lomax (uncredited)
Mother at Zoo (uncredited)
TV Show Floor Director (uncredited)
Sir Lionel Dean (uncredited)
TV Program Announcer (uncredited)
Charles Greene (uncredited)
Ludwig Reichenheim (uncredited)
Sergeant Bromley (uncredited)
Sound Engineer (uncredited)