Cold Case Wiki
Billingsley in 2014
John Billingsley
Date of Birth May 20, 1960
Place of Birth Media, Pennsylvania, USA
Status Active
Character played George Marks (1985 & 2005) (Episode Mind Hunters & The Woods)

John Billingsley (/ˈbɪlɪŋɡzli/, born May 20, 1960) is an American actor known for his role as Doctor Phlox on the television series Star Trek: Enterprise.

Aged 44 in 2004 at the time of the production of his appearance in different episode of the second season, Billingsley was already well known to fans of this series for his guest appearance in the show's second season, playing serial killer George Marks, the only killer on the show to have gotten away with murder in the episode Mind Hunters. Billingsley would later reprise the role in the season finale in the episode The Woods, in which Marks was been killed.


  • Billingsley was one of the guest artist of the series which he portrays the same character in 2 different episodes of the same season.
  • By the time the Mind Hunters episode was been aired, Billingsley became a regular characater on Star Trek: Enterprise.