An Inshore Minesweeping Unit has been forgotten by the Navy after World War II on the peaceful island of Boonsley and they have adapted to their circumstances. The men still wear uniforms and the proper reports are filed, although the reports of hundreds of mines are exaggerated. The captain spends his time fishing, the Number One is busy romancing the only Wren on the island and The Chief Boatswain runs a wine smuggling business. Unfortunately the Navy start to get suspicious.
Cecil Parker
as Cmdr. Stanton
Ronald Shiner
as CPO Banyard
Leslie Phillips
as Lt. Pouter
Elvi Hale
as Leading WREN Heather
Cardew Robinson
as Lt. Binns
Gordon Jackson
as Leading Seaman Johnson
Hattie Jacques
as Fortune Teller
Nicholas Phipps
as Capt. Povey
Harold Kasket
as Gaston Higgins
Harold Kasket
as Lt. Bates R.N.
Llewellyn Rees
as Adm. Troutbridge
Clive Morton
as Rear Admiral
