An English professor decides that there are too many useless people in the world and invents a gas that will kill them off. But first they'll at least have a good laugh.
Leo McKern
as Professor Kerris Bowles-Ottery
Janet Munro
as Delia Brooks
Maxine Audley
as Clarinda Bowles-Ottery
Dennis Price
as Dr. John Hughes
Miles Malleson
as Dr. Woolley
Mervyn Johns
as Willie Pugh-Smith
Leonard Rossiter
as Dr. Fisher
Jennifer White
as TV Make-Up Girl
Patricia Jessel
as Mrs. Pugh-Smith
Duncan Macrae
as Dr. Brass
George Benson
as Inspector Butts
Ralph Michael
as Superintendent Rastleigh
