Double Cross

Produced at Beaconsfield (now home to the National Film and Television School), this adaptation of Kern Bennett's spy thriller The Queer Fish benefits from its Cornish locations and director Anthony Squire's tight use of the cramped conditions on board a cross-channel fishing boat. 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. Fay Compton and William Hartnell provide serviceable support, and there's a taste of things to come for inspector Raymond Francis, who would headline the TV crime series No Hiding Place.