On screen
Cast
9 credited performers
Gerald Flood
Conway Henderson
George Coulouris
The Imposter / Harcourt Brown
Artwork unavailable
Stewart Guidotti
Geoffrey Wedgwood
Artwork unavailable
Pamela Barney
Professor Mary Meadows
Artwork unavailable
Hester Cameron
Margret Henderson
Artwork unavailable
Hugh Evans
Ian Murray
Artwork unavailable
Astor Sklair
John Field
Bernard Horsfall
Professor Hawkins
Peter Williams
Professor Norman Wedgwood