Ηθοποιοί επεισοδίου
Reginald TateProfessor Bernard Quatermass
Isabel DeanJudith Carroon
★
Hugh KellyJohn Paterson
Duncan LamontVictor Carroon
Paul Whitsun-JonesJames Fullalove
★
John GlenDr Gordon Briscoe
★
Ian ColinDI Lomax
★
Frank HawkinsDS Best
Christopher RhodesDr Ludwig Reichenheim
Moray WatsonPeter Marsh
Oliver JohnstonNews Editor
★
Peter BathurstCharles Greene