Digging Up the Marrow Believing is seeing. A documentary filmmaker turns his lens on an enigmatic conspiracy theorist who claims he's found the entrance to a vast underground city populated entirely by monsters. Details Casts Videos Galleries Posters Title Digging Up the Marrow Release Date 2015-02-20 Runtime 01 Hours 38 Minutes Genres Thriller Mystery Horror Fantasy Science Fiction Drama Production Companies ArieScope Pictures Production Countries United States of America Ray Wise... William Dekker... Adam Green... Self... Kane Hodder... Self... Mick Garris... Self... Rileah Vanderbilt... Self... Josh Ethier... Self / Vance / Little Big... Tom Holland... Himself... Sarah Elbert... Self... Alex Pardee... Self / Park Ranger... Nic Henley... Harlequin... Caitlyn Brisbin... Tombstone... Robert Pendergraft... Shadow... Steve Agee... Self... Steven Barton... Self... Dave Brockie... Oderus Urungus... Don Coscarelli... Self... Evan Dickson... Self... Corri English... Self... Arwen Green... Self... Lloyd Kaufman... Self... Joe Lynch... Self... Laura Ortiz... Self... Tony Todd... Self... Digging Up the Marrow Official Trailer 1 (2015) - Sci-Fi Thriller HD (Trailer) Original Size (1280x720) Original Size (500x750) Original Size (2000x3000) Original Size (2000x3000) Original Size (960x1440) Original Size (1287x1931)