Charles Bronson
as Flight Lt. Danny Velinski 'The Tunnel King'
James Donald
as Group Capt. Ramsey 'The SBO'
Gordon Jackson
as Flight Lt. Sandy MacDonald 'Intelligence'
John Leyton
as Flight Lt. William Dickes 'The Tunneler'
Angus Lennie
as Flying Officer Archibald Ives 'The Mole'
Nigel Stock
as Flight Lt. Denys Cavendish 'The Surveyor'
Jud Taylor
as Goff
William Russell
as Sorren
Robert Desmond
as Griffith 'Tailor'
Tom Adams
as Dai Nimmo ('Diversions')
Lawrence Montaigne
as Haynes ('Diversions')
Hannes Messemer
as Kommandant von Luger
Robert Freitag
as Capt. Posen
Karl Otto Alberty
as S.S. Officer Steinach