The Woman in the Fifth, a French/British/Polish Suspense Movie

This is an intriguing "artsy/fartsy," movie if you will, but one that works on all burners: suspense, drama, intrigue and angst.  Plus, you have Kristin Scott Thomas who plays the mysterious Margit opposite the much younger, rumpled professor, Tom, (Ethan Hawke) who is in Paris trying make amends with his estranged wife and daughter.  The Film is by the BAFTA award winning film maker Pawel Pawlikowski based on the novel by NYT best selling author, Douglas Kennedy (The Big Picture.)  I was drawn into the dark underworld of Paris and into the forlorn lost soul of Tom.  Is Tom a victim, a vicious murderer or a man whose sanity is in question?  This question is one of many, for example, do we buy a torrid love affair between Hawke and Thomas? Or, who would have forseen the cherubic baby face Hawke from Dead Poet's Society, would mature into a scraggly looking actor who holds his own against Thomas and made this rather French/British/Polish Noir film into the art house movie you will want to talk about and debate long after seeing this gem.