Jean Simmons
— Emmeline Foster
Donald Houston
— Michael Reynolds
Noel Purcell
— Paddy Button
James Hayter
— Dr Murdock
Cyril Cusack
— James Carter
Maurice Denham
— Captain
Philip Stainton
— Mr. Ansty
Patrick Barr
— Mr Bruce
Russell Waters
— Craggs
Peter Jones
— Michael-child
Susan Stranks
— Emmeline--As A Child
Peter Rudolph Jones
— Michael, as child (as Peter Jones)
Nora Nicholson
— Mrs. Stannard
Lyn Evans
— Trotter
Stuart Lindsell
— Yacht owner
Dorothy Batley
— His wife