The Keeper of Underwood Asylum has the mental patients of the wealthiest families in British Columbia. The rest of the family members have been dying under mysterious circumstances, so Biggs hires private investigator Richard Driver, who puts his assistant, Maybelline, in the asylum pretending she is his cousin and that they came from a family where the parents were all first cousins to each other and they decided to keep their love platonic for genetic reasons. Then he tries to get Inspector Clarke to check him in as a narcoleptic who didn't wake up with his body. They all know what the keeper has been doing, but it is a matter of proving it, and avoiding the hypnotized Biggs twins and Danny, who he is able to keep catatonic with his machine. Inspector Clarke gives driver a lot of trouble, and the kid giving shoe shines looks down on everybody, knowing more.
Christopher Lee
Tell Schreiber
Sally Drake
Ross Vezarian
Ian Tracey
Bing Jensen
Jack Leavy
Leo Leavy
Malcolm Britton
Michael Meade
Burke Lundy
David Engleman
Wendy Who
Victor Mallia
Laura Thaw
Alex Kliner
Vikki Vogel
Paddy White
Edith Powell
Christian Bruyère
Denton Coates
Rod Padmos
Tom Jesse
Anthony Roy McKinley
Margee Bruyere
Jeanie McKinnon
Linda Grabler White
Joyce Williams
Peggy Hart
Ian Newby
Bob Hetherington
Phillipa Malczewska
Richard Keymar
Victor Dela Lux