Casts
Will Hay
as Prof. Davis
John Mills
as Bobby Jessop
Basil Sydney
as Costello
Felix Aylmer
as Crabtree
Thora Hird
as Joyce
Henry Hewitt
as Prof. Davys
Frank Cellier
as Innsbach
Joss Ambler
as Sir John
Frank Allenby
as Onslowe
George Woodbridge
as Male Nurse
