A professor teaching at a correspondence school discovers that a Nazi agent is trying to prevent a trade treaty being signed between England and South America.
Director
Writers
John Dighton, John Dighton, Angus MacPhail
Prof. Davis
Bobby Jessop
Costello
Crabtree
Joyce
Prof. Davys
Harman
Innsbach
Sir John
Onslowe
Matron
Sister Spooner