Many laughs, as well as a fine and well-known cast! From the outset, though, the real star of this film has to be Kenneth Connor, who shows just how brilliant an actor he was. His portrayal of a lowly ship's rating, enthralled with electronics, yet accident prone, is completely believable. However, he comes into his own, when he is made up to become the absent minded "boffin" and then an "old dragon" of a female scientist. With the ever lovely Joan Simms, a bearded Sid James, Leslie Phillips and even a rare appearance of the late great Spike Milligan, who gives a plausible impression of an Indian electrician. Even a relatively minor appearance of a young Hattie Jacques, helps to make this a film that will guarantee a lot of laughs. Watch out for the "Potter" play on words, very cleverly written and brilliantly executed. Another fine performance, too, by Noel Purcell, who plays the Admiral brilliantly! You will even see some views of Chatham Dockyard - most of it has gone now, but some parts can still be seen, such as the main gate! The plot? They lost that ages ago, but it's all about a disastrous torpedo, that blows up the wrong ships and how our hero (Kenneth Connor) tries to save the day. Very typical, early Carry On; timeless!