Co-directors Ariel Schulman and Henry Joost make a fascinating-by-design docudrama about a Facebook romance between a Manhattan photographer named Nev and Megan, a 17-year-old girl. 'Catfish' is an original, humorous, dark and profound look at the nature of modern-day communication. Google Maps, Facebook posts and cell phone conversations only tell so much about what or who is real. Grade: B-plus.