Compton Bennett's war drama The Gift Horse follows the fortunes of ageing destroyer The Ballantrae and her crew from the time they come together in 1940 until the climactic raid on occupied St Nazaire in 1942. Trevor Howard plays Lt Cmdr Hugh Alginon Fraser, the newly appointed captain, back in service after having left the navy following a court martial.

A member of British Intelligence assumes a fictitious criminal identity and allows himself to be caught, imprisoned, and freed in order to infiltrate a spy organization and expose a traitor; only, someone finds him out and exposes him to the gang...