Doctor in Trouble

Doctor in Trouble is a 1970 British comedy film, the seventh and last film in the Doctor series. It was directed by Ralph Thomas and stars Leslie Phillips as a doctor who gets accidentally trapped on an outgoing cruise ship while it begins a round the world trip. The cast was rounded out by a number of British comedy actors including James Robertson Justice, Harry Secombe and Angela Scoular. It was based on the story Doctor on Toast by Richard Gordon.

Doctor Burke Leslie Phillips becomes a stowaway by mistake when chasing his girlfriend Angela Scoular onto the ship to propose to her. She is one of a group of models doing a fashion shoot with camp photographer Graham Chapman. Other passengers aboard ship include pools winner Llewellyn Wendover Harry Secombe and Mrs. Dailey Irene Handl, a socially ambitious lady hoping to find a wealthy match for her daughter Dawn Janet Mahoney.Burke is pursued by the MasteratArms Freddie Jones who correctly suspects that he does not have a ticket. Burke tries various ruses to try to escape him, including dressing up as a doctor. Eventually he is caught and exposed as a stowaway. Captain Spratt orders him to serve as an orderly, scrubbing the ship. ........

Source: Wikipedia