I saw the version starring Woody Allen and feel it is far superior to this film. The play was a hit on Broadway and starred Lou Jacobi.
Allen wasn't a big name when this film was made, so he didn't direct the film and the studio did what they wanted with it.
It's the story of a successful caterer, Walter Hollander (Jackie Gleason) and his family, wife Marion and daughter Susan (Estelle Parsons and Joan Delaney) who are on vacation. Walter had wanted to go to Miami, but Marion wanted a tour of Europe. So they went to London, Paris, Barcelona, and Rome. On their way to Athens, their plane is hijacked.
They land in a Communist country, Vulgaria, and are taking photos when they Vulgarians go after them, thinking they are spies. The American Embassy saves them and protects them. They can't leave until their travel is arranged.
Their fate is in the hands of a bumbler, Axel (Ted Bessell), the son of the Ambassador. He makes mistake after mistake and his negotiations with the big shot on the other side, Krojack (Michael Constantine) don't go well. Meanwhile the Hollanders are trying to figure out how to escape and go home.
This is a funny and entertaining film, but Allen's version is laugh out loud hilarious, and Allen is a scream. The funniest scene here for me was when Walter is burned in effigy, and they dress the mannequin in clothes identical to Walter's - very loud and very funny.
Gleason is way out there in the role, very Ralph Kramden, and Parsons as his cheerful wife is very good and looks great - I know her only as an elderly woman, but she's always been a terrific actress. Bessell is excellent as well as a sincere goof-up.
Good but not great. See the Allen version, which was done as a TV movie.