Alastair Sim
— Dr. Knox
George Cole
— Dr. Walter Anderson
Adrienne Corri
— Mary Paterson
Jill Bennett
— Mary Belle
Margaret Gordon
— Amelia
Diarmuid Kelly
— Burke
Michael Ripper
— Hare
Peter Halliday
— Adolphus Raby
Frank Taylor
— Paterson
Jefferson Clifford
— Nebby
Doria Noar
— Janet
Irene Sunters
— Jessie Ann