Margaret NealeJune Challis Ralph NossekProfessor Ramsay Trevor BannisterPeter Barry Brandon BradyBrian Barclay Celia BannermanDiana Winters Julian SomersSir John Chandos Terence DonovanCaptain Wade Jeffry WickhamDr. Baranov Lindsay CampbellDr. Rickover Robert O'NeilPresident McCone Dmitri MakaroffPremier Yeremenko Christopher McMasterManusforfatter Andrew DrummondProduction Design 
