Brennan and Booth stumble upon a subterranean world of homeless people when they find the remains of a filmmaker in the ventilation shaft of an underground tunnel.
Quest roles:
David Denman(Phil Garfield), Glenn Plummer(Harold Overmeyer), Mary Mara(Helen Bronson), Ryan Alosio(Duke Diallel), Brian Gross(Kyle Montrose), Keith Pillow(Michael Preston), Fay Wolf(Marni Hunter), Matt Huhn(Cop), Joe Duffy(Homeless encampment (uncredited))