Captain Mahmoud is a non-canonical character created for the 2022 Kenneth Branagh adaptation of Death on the Nile. He is the captain of the Karnak. In the original there was an unnamed "manager" on the boat although there presumably was a captain as well, although he did not appear.
Captain Mahmoud appears in several scenes and is often heard giving commands (in voiceover) to the crew. He is seen welcoming the passengers when they arrive on board. During the dance scene where many crew members dance with the guests, Mahmoud is seen dancing with Bowers. At the end of the film he falls the crew in to say farewell to the guests as they disembark. Unlike the captains/cruise managers in other film adaptations such as Mr Choudhury, Captain Mahmoud is not shown directly interacting with Poirot or consulting him, for example in asking him to take charge of investigations, although presumably he must have done so.
Captain Mahmoud is portrayed by Naveed Khan