The Clouded Yellow on AllMovie

The Clouded Yellow stars Trevor Howard as David Sommers, a former member of the British Secret Service. After the war, Sommers takes a low-profile job cataloguing butterfly specimens. While thus employed, he make the acquaintance of Sophie Malraux (Jean Simmons), a curious young lady who seems to be hiding something. Indeed she is, as Sommers discovers when Sophie is brought up on murder charges. Championing her cause, Sommers helps Sophie escape, prompting Scotland Yard to put another ex-secret agent on the couple's trail. The chase extends from London to Liverpool, culminating in a tangled web of murder and madness. The Clouded Yellow was the first independent production supervised by Betty E. Box.