The Domino Principle is a weak and tedious potboiler starring Gene Hackman as a tool of mysterious international intrigue, and a barely recognizable Candice Bergen in a brief role as his perplexed wife. Stanley Kramer’s film contains a lot of physical and logistical nonsense.
Adam Kennedy gets adaptation credit from his own novel. Hackman has been carefully spotted years earlier as an amoral and violent type, just the kind of guy that ‘they’ can use to assassinate selected public figures. We never know who ‘they’ are, but ‘their’ lower-level stooges include Richard Widmark, Eli Wallach and Edward Albert, each more or less archetypic organizational characters.