Joss Ackland as CS Lewis

Claire Bloom as Joy Gresham

David Waller as Warnie Lewis

Rupert Baderman as Douglas

Rhys Hopkins as David

Alan MacNaughtan as Christopher Riley

Philip Stone as Harry Harrington

Tim Preece as Alan Gregg

Norman Rutherford as Paxford

John Ringham as Doctor

Henry Moxon as Solicitor

Michael Cunningham as Registrar

Max Harvey as Radio Announcer (voice)

Jim Kirby as Father Fisher

Dilys Price as Sister

Richard Merrett as Student