Doublecross, also known as Queer Fish, is a 1956 second feature[1] British crime film directed by Anthony Squire and starring Donald Houston, Fay Compton and William Hartnell.

When quizzed by the police, Albert reveals that he dropped the spies at Lands End, England, knowing that they could not get off the beach and had no idea that it was not France, and defends Anna as being completely innocent.

The Monthly Film Bulletin wrote: "Fay Compton gives a vigorous but wasted performance in this, indifferently directed adventure story.

There are some good comedy moments, notably when Albert's friends sneak his poached salmon away from the Fisheries officer; on the whole, though, the film descends to the level of trite melodrama, only partly redeemed by its natural settings.

Otherwise, it's B-business as usual, as salmon poacher Donald Houston realises mysterious passengers Anton Diffring and Delphi Lawrence have tricked him into ferrying Cold War secrets.