Not Wanted on Voyage (1957)

"Two cabin stewards working on a luxury vessel on a Mediterranean cruise to Tangier attempt to earn extra money from the passengers using every possible means."

The scheming Albert Higgins and his dim witted mate Cecil Hollebone, set out on a ocean voyage under the exasperated chief steward. Along for the trip are the wealthy Mrs. Brough and her secretary Pat. Soon Mrs. Broughs’ jewels are stolen…