The Clouded Yellow DVD - (1950) - Trevor Howard, Jean Simmons, Sonia Dresdel

After a successful career in the British Secret Service dating back to the Second World War, ex-Major David Somers (Trevor Howard) is dismissed after making a mistake on his last mission. The only work he can find is cataloging butterflies at the country house of Nicholas and Jess Fenton. (The "clouded yellow" of the title is a rare species of butterfly.) Somers and Sophie Malraux (Jean Simmons), Jess's niece, become attracted to each other. After the murder of Hick, a local gamekeeper and Jess's lover, suspicion wrongly falls on Sophie. She is considered mentally fragile because of the murder-suicide of her parents when she was six, the memory of which she has suppressed.

Somers helps Sophie to evade arrest, and they go on the run together. Somers using his secret-service skills and contacts to stay one step ahead of the police and Willy Shepley, a Secret Service agent. After a cross-country chase, they arrive at Liverpool with the intention of leaving the country by ship. The true identity of the murderer of Hick is revealed to be Sophie's uncle Nicholas, who also killed Sophie's parents, as her father was also one of Jess's lovers. Nicholas chases Sophie onto a warehouse roof, where he slips and falls in the path of a passing train.

Starring - Trevor Howard, Jean Simmons, Sonia Dresdel