Love the intrigues and the cloak and dagger stuff. Matthau is great fun to watch playing a "your grandfather as super spy". Moves a long a great pace. Matthau is charming and hits just the right note.
Leonard Maltin/Plot synopsis:
Entertaining contrivance about a maverick CIA operative who's fed up with his idiotic boss (Beatty) and decides to teach him a lesson by publishing his volatile memoirs. Barely believable, but fun to watch, thanks largely to Matthau. From the novel by Brian Garfield, who coproduced and coscripted the film. Panavision.