Calificación
Reparto

Terence Longdon
Mark Robert Kingston

Donald Gray
Inspector Wills

Diane Clare
Mary Johnson

Robertson Hare
Ronald Fortescue

Dermot Walsh
Prof. Henry Taylor

Jill Hyem
Joy Clark

Felicity Young
Jill

Douglas Muir
Detective Sergeant Willoughby

Edwin Styles
Sir Lionel

Tony Thawnton
College Tutor