HBO's new hit comedy series Family Tree premieres Sunday, May 12 at 10:30pm. Christopher Guest, working alongside Jim Piddock, brings his unique take on the mockumentary to television with this weekly sitcom starring Chris O'Dowd. The story follows a 30-something who begins to explore his deep family roots after inheriting a mysterious box from his great aunt. Watch as Tom meets some of his extended family in this second trailer from the anticipated comedy.

Family Tree debuts May 12 only on HBO.