| River Patrol | |
| Director: | Ben R. Hart |
| Producer: | Hal Wilson |
| Cinematography: | Bertram Brooks-Carrington |
| Editing: | James Corbett |
| Runtime: | 46 minutes[1] |
| Country: | United Kingdom |
| Language: | English |
River Patrol is a 1948 British crime film directed by Ben R. Hart and starring John Blythe, Lorna Dean, and Wally Patch. The screenplay concerns a group of undercover British customs officer who investigate a gang of nylon smugglers. It was made by Hammer Film Productions as a supporting feature. It was made at Marylebone Studios in London. It is notable for being one of the earliest films made by Hammer following its relaunch after the Second World War.
Two British police officers, Robby and Jean, go undercover, pretending to be husband and wife in order to smash a ring of smugglers along the Thames. During the investigation they visit the most shady places of London, including a night club with the worst imaginable reputation in the city. The fake spouses befriend and dupe the night club owner and find evidence leading to the top of the smuggler ring. However, their identities are revealed by the criminals before they can report back to their superiors, and they have to fight alone against the thugs until they finally manage to get them all arrested.[2]