André Morell
Professor Bernard Quatermass (6 eps)
Cec Linder
Dr. Matthew Roney (6 eps)
John Stratton
Captain Potter (6 eps)
Christine Finn
Barbara Judd (6 eps)
Anthony Bushell
Colonel James Breen (6 eps)
Michael Ripper
Sergeant (5 eps)
Harold Goodwin
Corporal Gibson (5 eps)
Clifford Cox
First Private (5 eps)
Brian Gilmar
Second Private (5 eps)
Richard Dare
Private Secretary (4 eps)
Brian Worth
James Fullalove (4 eps)
Richard Shaw
Sladden (4 eps)
Robert Perceval
Minister (3 eps)
Ian Ainsley
Police Inspector (3 eps)
John Walker
Private West (3 eps)
Tony Quinn
News Editor (3 eps)
Noel Howlett
Vicar (3 eps)