Good to see Colin Farrell getting a leading role, and he holds his own well here despite a slightly dodgy script and a flat ending. Premise of the film offered a lot and, while we enjoyed the movie, I think it could’ve offered more. That aside, Farrell plays his part well, Kiefer Sutherland earns his easiest money yet as the disembodied ‘Caller’. Enjoyable, only the script and an occasional loss of focus stopped this being a great thriller.