I am a fan of this movie, but it is hard to find (I saw it online tonight on Netflix). It is very similar in concept to the "Secret War Of Harry Frigg" with Paul Newman, with the "Fish Out Of Water" American, being in occupied Italy, towards the end of WWII, meeting up with the beautiful Itallian Woman. However it is a better film. What makes it work is the relationship between Heston and "The Itallian Cupcake" Elsa Martinelli. Neither one of the two are doing comedy, or even trying to. They are both very strong willed individuals, who although they belong together, and will be at the end, are not changed by what is happening around them (Unlike Newman's Frigg, or James Garner and Julie Andrews in "The Americanization Of Emily"). Which along with a rare chance to see Heston in a comedy, and awesome sights of Rome, make this worth watching.
Review of The Pigeon That Took Rome
