Générique complet
The Dark Stairway
Hugh Williams
Dr. Thurlow
Chili Bouchier
Betty Trimmer
Garry Marsh
Dr. Mortimer
Reginald Purdell
Askew
James Stephenson
Inspector Clarke
Glen Alyn
Isabel Simmonds
JC
John Carol
Merridew
Lesley Brook
Mary Cresswell
Robert Rendel
Dr. Fletcher
AP
Aubrey Pollock
Dr. Cresswell
EB
Elsa Buchanan
Syd Crossley
Katie Johnson
RL
Ross Landon
MP
Muriel Pope
IT
Ivy Tresmand