John Robinson

Professor Bernard Quatermass

Hugh Griffith

Dr. Leo Pugh

John Stone

Captain John Dillon

Monica Grey

Paula Quatermass

Austin Trevor

Fowler

Ian Wilson

Ernie

Rupert Davies

Vincent Broadhead

Edwin Brown

Paratrooper

Cyril Shaps

Control Assistant

Wilfrid Brambell

Tramp

Melvyn Hayes

Frankie

Roger Delgado

Hugh Conrad

Nigel Kneale