Two men working on the docks close to London's Tower Bridge find the body of an unidentified man floating in the Thames. The police later identify the body to be that of a diamond courier from Holland. The police have to find his murderer, as well as the missing diamonds he was carrying.
Dermot Walsh
Alexander James
Sydney Tafler
Victor Skinner
Mary Germaine
Rose Reid
Guy Verney
Snow White
Hugh Morton
Inspector Cathie
James Raglan
Mr. Wynn
Derek Blomfield
Philip Reid
Nicolas Bentley
Collis
Arnold Marlé
Otto
John Serret
Delbos
