Tiger Bay is a 1959 British crime drama film directed by J. Lee Thompson. The story revolves around a young girl named Hannah, who witnesses a murder committed by a sailor named Tommy. As she grapples with the moral dilemma of reporting the crime, the film explores themes of innocence and loyalty. Set in the bustling port of Cardiff, the film showcases the gritty atmosphere of the city and its diverse characters. Tiger Bay features a notable performance by John Mills as a detective, who becomes embroiled in the investigation while trying to protect Hannah from the dangerous criminal world.