- Writer:
- Nigel Kneale
- Producer:
- Rudolph Cartier
- Settings:
- Richard R. Greenough
- Victor Carroon:
- Duncan Lamont
- Judith Carroon:
- Isabel Dean
- Professor Bernard Quatermass:
- Reginald Tate
- Dr. Gordon Briscoe:
- John Glen
- Detective Inspector Lomax:
- Ian Colin
- Detective-Sgt Best:
- Frank Hawkins
- Dr. Ludwig Reichenheim:
- Christopher Rhodes
- Charles Greene:
- Peter Bathurst
- John Paterson:
- Hugh Kelly
- James Fullalove:
- Paul Whitsun-Jones
- American Reporter:
- Philip Vickers
- Indian Reporter:
- Edward David
- Miss Wilde:
- Katie Johnson
