Dermot Walsh

Guy Thornton

Hazel Court

Margaret Thornton

Joss Ambler

Yacht Port Manager

Hugh Burden

Dr. Fawcett

Mignon O'Doherty

Mrs. Manley

Hugh Latimer

Peter

Joan Carol

Mrs. Martineau

John Robinson

Prof. Martineau / Mansel

Joss Ackland

Ron, 2nd Fisherman

John King-Kelly

Sid, 3rd Fisherman

Laidman Browne

Coroner

Meadows White

Mr. Leech, Surveyor

Patricia Owens

Party Girl (Joyce)

Melissa Stribling

Party Girl (Vera)

Ian Carmichael

Bernard

Geoffrey Dunn

Strange Passenger

Pat McGrath

Bert, 1st Fisherman