Dana Andrews
Dr. John Holden
Percy Herbert
Farmer
Athene Seyler
Mrs. Karswell
Maurice Denham
Professor Henry Harrington
John Salew
Librarian
Brian Wilde
Rand Hobart
Liam Redmond
Professor Mark O'Brien
Peggy Cummins
Joanna Harrington
Niall MacGinnis
Dr. Julian Karswell
Reginald Beckwith
Mr. Meek
Ewan Roberts
Lloyd Williamson
Rosamund Greenwood
Mrs. Meek
Richard Leech
Inspector Mottrarn
Lloyd Lamble
Detective Simmons
Charles Lloyd Pack
Chemist
Ballard Berkeley
Michael Peake
Wallace Bosco
John Harvey
Hobart's Brother