Doctor at Sea is a 1955 British comedy film, directed by Ralph Thomas, produced by Betty E. Box, and based on Richard Gordon's 1953 novel of the same name. This was the second of seven films in the Doctor series, following the hugely popular Doctor in the House from the previous year. Once again, Richard Gordon participated in the screenwriting, together with Nicholas Phipps and Jack Davies, and once again Dirk Bogarde played the lead character Dr Simon Sparrow. The cast also includes James Robertson Justice and Joan Sims from the first film, but this time playing different characters. This was Brigitte Bardot's first English-speaking film.

Betty Evelyn Box was a prolific British film producer, usually credited as Betty E. Box.