The Visitor (2008)

Vale is a dull widower and professor at a Connecticut university whose life is transformed for the better after he discovers Syrian squatters Tarek (a percussion artist) and his girlfriend Zainab (a jewellery maker), living in his New York apartment. When Tarek is taken into a corporate-run alien detention centre, Vale becomes his only conduit to the outside world and helps Tarek's mother Mouna with her efforts to free her son.

Official website: http://www.thevisitorfilm.com/