Which American actor, known for his role as Doctor Phlox, co-starred with David Lee Smith in the film "The Man from Earth"? 
David Lee Smith: David Lee Smith (born September 8, 1963) is an American actor, known for his role as John Oldman, the protagonist of the 2007 science fiction film, "The Man from Earth"; he co-starred with John Billingsley and Tony Todd. John Billingsley: John Billingsley ( , born May 20, 1960<ref name="http://www.imdb.com/name/nm0082517/?ref_=fn_al_nm_1"> </ref>) is an American actor, known for his role as Doctor Phlox on the television series "".
John Billingsley