A charming tour guide (Ian McShane) takes a busload of American tourists on a nine countries in eighteen days European tour. The bus is full of comical personalities, including Samantha Perkins (Suzanne Pleshette) who is seriously trying to find herself on this vacation. The tour guide tries to romance her and change her mind about a number of things. Mix-ups ensue, including one person who gets on the wrong bus.
If It's Tuesday, This Must Be Belgium is a throwback to how films were made. Joan Collins, John Cassavetes, Elsa Martinelli, Ben Gazzara, and Norman Fell also appear in the film. It's really a delightfully funny movie.