- Country: UK
- Genres: Crime, Drama
- Release: 1954-07-16
- Director: Guy Green
- Writers: Rex Rienits
- Language: English
- Stars: Phyllis Kirk , John Bentley , Robert Ayres , Leonard White , Ewan Roberts , Glyn Houston , Charles Lloyd Pack , David Hurst , Margaret Anderson , Michael Balfour
- Runtime: 70 min
- Awards: N/A
- AKA: Alarm på Themsen (Sweden) , River Beat (United States of America) , Die Jagd begann im Hafen , Die Jagd begann im Hafen (Austria) , Lontoon salakuljettajat (Finland) , River Beat , Jaget af flodpatruljen (Denmark) , River Beat (United Kingdom)
- Plot: A London police inspector is patrolling the river looking for smugglers, when he becomes attracted to a woman working as a ship's radio operator. When the woman turns up in possession of some smuggled gems, the inspector must determine whether she knew about them or was just being used. If she is guilty, he must arrest her in spite of his feelings. If she is innocent, he must protect her from the smuggling gang, which is known to silence anyone who might talk.
- IMDB:tt0047421
River Beat Cast · · · ALL
Guy Green
Director
Phyllis Kirk
Judy Roberts
Leonard White
Det. Sgt. Mack McLeod
Glyn Houston
Charlie Williamson
Patrick Jordan
Albert Fisher, called both "Al" and "Bert"
Harold Ayer
Steward Alfred Gordon, also called "Al"
David Hurst
Paddy Maclure
Charles Lloyd Pack
John Hendrick
Robert Ayres
Ship's Captain Watford
Ewan Roberts
Customs Chief J. S. Blake
Michael Balfour
Adams