Teeny-tiny Hammer pictures built its reputation on second-feature melodramas before graduating to gore-encrusted horror epics. Cloudburst is a low-key thriller starring American actor Robert Preston, whose casting assured a certain degree of business in the States. Preston plays a code expert, resettled in England after the war and working at the British Foreign Office. One morning, Preston's wife is struck down and killed by a car driven by escaping criminals. Preston bypasses the efforts of Scotland Yard and pursues the criminals himself, using his codebreaking skills to track down the "big boys" in charge. Robert Preston - John Graham Elizabeth Sellars - Carol Graham Colin Tapley - Inspector Davis Sheila Burrell - Lorna Dawson Harold Lang - Mickie Fraser Mary Germaine - Peggy Thomas Heathcote - Jackie George Woodbridge - Sgt. Ritchie Lynn Evans - Chuck Peters Edith Sharpe - Mr. Reece James Mills - Thompson Daphne Anderson - Kate Edward Lexy - Cardew Noel Howlett - Johnson Robert Brown - Carter Charles Saynor - Constable Gerald Case - Doctor Frederic Steger - Porter Stanley Baker - Milkman Martin Boddey - Desk Sergeant