Escape by Night is a 1953 British crime film directed and written by John Gilling.
The highly suspicious Rossi promises Buchnan the rights to his life story as they hide out in an abandoned theatre in return for Buchnan, a former pilot, flying him to Italy. Through his nightclub singer girlfriend Rosetta, Rossi becomes suspicious that his brother Guillio plans to take over his gang. They are discovered by a young boy playing games by himself in the theatre with Buchan telling the boy they are Secret Service Agents and enlist the child as a junior secret agent to bring them food, supplies and deliver Buchnans stories to his editor and messages to Rosetta.
Source: Wikipedia