Ηθοποιοί επεισοδίου
John MillsBernard Quatermass
Simon MacCorkindaleJoe Kapp
★
Paul RoseburyCaraway
Jane BertishBee
★
Ralph ArlissKickalong
★
Margaret TyzakAnnie Morgan
Brian CroucherPolice Lt.
Margaret TyzackAnnie Morgan
★
Neil StacyToby Gough
Annabelle LanyonIsabel
★
Tudor DaviesTV Director
Kevin StoneyPrime Minister
David AshfordDavid Hatherley
★
Tony SibbaldChuck Marshall