Sabotage at Sea is a 1942 British, black-and-white, drama, mystery, war film, directed by Leslie S. Hiscott and starring Jane Carr, Margaretta Scott, David Hutcheson and Ronald Shiner as Ernie the Cook.

It has the overall format of a whodunnit but with a clear theme of protecting military secrets during the Second World War.

A series of vignettes introduce us to a selection of people who late turn out to be the individual suspects.

The unlikely scenario means that six would-be subjects are jointly kidnapped/shanghaied and kept on board while he investigates which one is the saboteur.

TV Guide wrote, "the cast is handicapped by an uneventful, wordy script.