Robert Powell as Keller

Jenny Agutter as Hobbs

Joseph Cotten as Priest

Angela Punch McGregor as Beth

Peter Sumner as Tewson

Lorna Lesley as Susan

Ralph Cotterill as Slater

Adrian Wright as Goodwin

Tyler Coppin as Boy

Kirk Alexander as Dr. Alexander

Jon Nicholls as Jackson

Roger Cardwell as Flight Engineer

Kirk Alexander as Dr. Martindale

Jenufa Scott-Roberts as Stewardess

John Edmund as Goswell

Denzil Howson as Rogan

Edwin Hodgeman as Bain

Heather Steen as Allens

Brenton Whittle as Thornton

Geoffrey Pullan as Osborne

Robin Bowering as Stuart

Chrissie James as Secretary

Audine Leith as Doctor

Jacquy Phillips as Hysterical Woman

Tim Rice as Newscaster

Maurice Saidi as First Onlooker

Henry Scott as Second Onlooker

Paul Sonkkila as Fisherman

Paul Churlish as Engineer

Don Quin as Supervising Engineer

Brigette Webster as Child