Conor O'Farrell - born on January 13, 1956ATF Agent Keaton in the FX series Justified.in Riverside County, California - is an American actor who has a recurring role as
O'Farrell's most prominent roles are as Darren Leopold on daytime soap opera Port Charles, Phil Albano on the short lived science fiction series Dark Skies and as Jeffrey McKeen on the crime drama CSI: Crime Scene Investigation. He has been appearing in television shows since the late 1980s, having had recurring roles in Murder One, Party of Five, Buffy the Vampire Slayer, Without a Trace, 24, Medium and as Dr. Sledge in the miniseries The Pacific'.
In 1998, he appeared in the HBO mini-series From the Earth to the Moon playing astronaut Jim McDivitt.
In 1999, he co-starred with Kevin Bacon in the supernatural thriller film Stir of Echoes.
In 2002, he co-starred with David Caruso in CSI: Miami as Charlie Berenger in the episode Losing Face, and in 2006 he made a brief appearance as Brogan Cooper in the US hit television series Cold Case.