My wife and I both thought this film a watered-down, made-for-TV (BBC) version of Manhattan Murder Mystery...which is itself good, but not great. The story has little inter- character tension or chemistry, and not much of a plot. Woody Allen's character just sort of wanders around running off at the mouth, and Hugh Jackman and Scarlett Johannsson don't have a lot more to do. It's pretty disappointing, I must say. Ian McShane's role is just an expanded cameo appearance.
The first thing that occurred to me was "I wonder how much the BBC had to pay Woody Allen to dislodge him from Manhatttan?" He must've needed the money, and they must have needed his appeal to expand their audience beyond the youth market drawn to the two stars. I'm giving this movie 4 stars instead of 3 because it is unbothersome background noise. If you ever want something to have on while you're knitting or sorting your stamp collection, this'll do the job. I wouldn't pay to rent it again.