Adrian Lukis

as Jack Gordon

as Tim Kendal

as Frans Banning Cocq

as Dr Hargreaves

as Lt. Col. Villiers

as Vanderbrink

as Rob Blake

as Edward de Thame

as Evgeny Dorn

as Professor Mason

as Leo

as Phillip Trent

as Julian Calder

as General Ravenscroft

as Francis Davison

as Home Secretary, Alex Wallis

as Rupert Middleton

as Vice-Admiral Conolly Abel Smith

as Dr. David Shearer

as John Sylvester

as Jack Bennett

as Blake Hardiman

as Wilhelm Röntgen