McNaught

In the stage play Murder on the Nile, McNaught is the Captain of the Lotus (also described in stage directions as the ship's manager). After the murder of Kay Ridgeway-Mostyn on board the ship, he sends a boat to notify the police and in the mean time, appoints Canon Ambrose Pennefather to interview the passengers and investigate the case. The part only has a brief appearance in one scene with a few lines and could have been written to suit a cameo appearance.

The novel Death on the Nile on which the play is based also has a ship's manager who is unnamed but who appoints Colonel Race and Poirot to investigate the shooting.