This month, TV viewers will have the chance to see Christopher Guest’s brand of comedy on a weekly basis in a new HBO series called, Family Tree. Written and created by Guest & Jim Piddock, the new comedy series is a single-camera, documentary-style show in the manner of Guest’s acclaimed feature films (such as Best in Show, Waiting for Guffman and A Mighty Wind). The loosely-improvised show stars Chris O’Dowd as an ancestry-obsessed slacker, who acquires a box filled of old family photos, travels to California to trace his lineage, and meets his long lost relatives. Family Tree premieres Sunday May 12 at 10:30pm ET/PT only on HBO. Watch a trailer and sneak peek below. Enjoy!