A mysterious bald audience member turning up on various live Fox broadcasts is a viral marketing plant—as well as an actor on the show he’s subtly promoting. Michael Cerveris, in character as “The Observer” from the sci-fi drama Fringe, has so far been spotted, well, observing football, auto racing, and American Idol, reports Variety. Even better, staffers refer to the sub rosa campaign as “Where’s Baldo?” (More live television stories.)