The Limping Man (1953) Film noir

World War II vet Frank Pryor (Lloyd Bridges) returns to London from America after six years to look up an old flame, Pauline French (Moira Lister), now a successful actress. As he and the other passengers deplane and walk across to the terminal, Frank pauses for a moment and asks the man beside him for a light. There's a gunshot and the man crumples to the ground, shot by a marksman with a high-powered rifle, an assassin with a limp. It's not long before Frank Pryor is up to his neck in murderous intrigue. Credit: Public Domain Movie - https://publicdomainmovie.net/