A poster for this film is featured in From Russia with Love (1963). It shows an Anita Ekberg head shot on the side of a building when 007 and Ali Kerim Bey are about to assassinate Krilencu. A window opens (appearing to be Ekberg's mouth) and Krilencu exits the building on a rope and is shot. After the assassination, 007 makes one of his inimitable quips as he says: "She should have kept her mouth shut". Both films were from United Artists. Note, however, that the relevant chapter of the Ian Fleming novel was titled "The Mouth of Marilyn Monroe".
This was, for 54 years, the only film produced by Eon Productions that was not part of the James Bond franchise. In 2017 Eon made Film Stars Don't Die in Liverpool, their second non-Bond film.
In his initial meeting with the US officials, Matthew Merriwether mentions Robert C. Ruark. Ruark was a noted US author who wrote several books with an African setting e.g. Something of Value, Uhuru.
Many of the key technical personal from the early James Bond films had the same jobs on this film. Ted Moore was the DP, Syd Cain was the art director, Maurice Binder designed the titles, John Stears did the visual effects, Monty Norman composed the music, Johanna Harwood was a scriptwriter.
The control tower footage when the Lufthansa flight arrival in Africa is announced is recycled footage originally used in the James Bond film Dr. No (1962). In Dr. No the footage is used to announce a Pan Am flight arrival in Jamaica.