Kojak Budapesten is a 1980 Hungarian film. Agatha Christie is one of the minor characters.
Lt. Kojak arrives in Budapest as a guest speaker for the 'International Crime Writers Conference'. Soon after he starts enjoying the pleasures that the city has to offer, he assists his old friends at the police department with a case. The case involves solving the murder of a noted scientist, unaware that a Mafia hit man and his female companion are targeting him.