A newly-arrived army chaplain is put in charge of camp entertainment and has the idea of putting on a Brains Trust with local notables. Unfortunately for him, it emerges from a question on the rights and wrongs of marriage that there is more going on between three of the panelists than he wants to know about - though the audience obviously thinks differently.

Reparto

Alastair Sim

Capt. William Paris

Elizabeth Allan

Angela Prout

Roland Culver

George Prout

George Cole

Soldier in Brains Trust audience

Colin Gordon

Professor Mutch

Martita Hunt

Lady Dodd

Janet Brown

Jessie

Peter Martyn

Walter

Miles Malleson

Dr. Hector McAdam

Edward Chapman

Joseph Byres M.P.

Cyril Chamberlain

Drill Sergeant

Michael Ripper

Drill Corporal

Robin Bailey

Intellectual Corporal

Michael Kelly

Staff Sergeant

Patrick Westwood

Soldier in Pub