Watch Your Stern is a 1960 British comedy film directed by Gerald Thomas and starring Kenneth Connor, Eric Barker and Leslie Phillips.

The officers are drinking gin and tonics in the captain's quarters while the crew are down below being given casual but technical lectures by Seaman Blissworth, who is very knowledgeable about torpedoes.

Blissworth accidentally spills a drink on the secret plans and hangs it out to dry in front of a heater.

In order to achieve this he has the petty officer's generous beard glued onto his chin, glasses are added and he adopts a Scottish accent.

Meanwhile Petty Officer Mundy is ordered to shave off the remains of his whiskers (as the only two Royal Navy options are clean shaven or "full set").

The highlights are Kenneth Connor's male and female impersonations and Spike Milligan's two brief appearances as a "Dockyard Matey"' – a welcome piece of sheer "goonery" in an otherwise conventional "Carry On" farce.

There aren't all that many laughs as twitchy tar Connor assumes a range of disguises to cover up a blunder over torpedo plans.