The character of Colonel Haki (played in this film by Joseph Wiseman who had been Dr. No (1962)) also appears in Eric Ambler's novel and film of The Mask of Dimitrios (1944) where Colonel Haki was played by Kurt Katch. In the original Journey Into Fear (1943), Colonel Haki was played by Orson Welles. Wiseman is the third and last person to date to play the character.
In 2001, Stan Douglas, an artist based in Canada's Vancouver (where this film was shot) did a second remake of Journey Into Fear (1943) but this third version this time was as a film installation with a recombinant soundtrack.
When Graham tackles Banat in the final chase scene, the silencer on Banat's pistol falls off. In the next shot, the silencer is attached to the pistol again.