After World War II the crew of a motor gunboat join together to buy their old vessel and go into business for themselves. This may sound like a laudable scheme, but the business they choose to go into is smuggling.
| Actor | Role |
|---|---|
 George BakerBill Randall | Bill Randall |
 Richard AttenboroughGeorge Hoskins | George Hoskins |
 Bill OwenBirdie | Birdie |
 Virginia McKennaHelen Randall | Helen Randall |
 Roland CulverMaj. Fordyce | Maj. Fordyce |
 Bernard LeeCustoms Officer Brewster | Customs Officer Brewster |
 Ralph TrumanSir Richard | Sir Richard |
 John ChandosRaines | Raines |
 Harold GoodwinCustoms Officer | Customs Officer |
 John LongdenDetective | Detective |
 Alfie BassSailor (uncredited) | Sailor (uncredited) |
 Stratford JohnsGarage Worker (uncredited) | Garage Worker (uncredited) |