ATTORI:

• Andrew Keir (Prof. Bernard Quatermass)
• James Donald (Dr. Mathew Roney)
• Barbara Shelley (Barbara Judd)
• Julian Glover (Colonel Breen)
• Bryan Marshall (Captain Potter)
• Maurice Good (Sergeant Cleghorn)
• Duncan Lamont (Sladden)
• Peter Copley (Howell)
• Edwin Richfield (Minister)
• Grant Taylor (Police Sergeant Ellis)
• Noel Howlett (Abbey Librarian)
• Thomas Heathcote (Vicar)
• Robert Morris (Jerry Watson)
• Bee Duffell (Miss Dobson)
• Sheila Steafel (Journalist)
• Hugh Futcher (Sapper West)
• Hugh Morton (Elderly Journalist)
• Hugh Manning (Pub Customer)
• June Ellis (Blonde)
• Keith Marsh (Johnson)
• James Culliford (Corporal Gibson)
• Roger Avon (Electrician)
• Brian Peck (Technical Officer)
• John Graham (Inspector)
• Charles Lamb (Newsvendor)
• David Savile (Army Officer)
• William Ellis (Journalist)
• Gareth Thomas (Workman (uncredited))
• Elroy Josephs (Black Workman (uncredited))
• Michael Poole (Older Workman (uncredited))
• Albert Shepherd (Loader (uncredited))