William Oliver Campbell born July 7 1959 is an American film and television actor He first gained recognition for his recurring role as Luke Fuller in the TV series Dynasty Then he became known for playing Rick Sammler on Once and Again Det Joey Indelli on Crime Story Jordan Collier on The 4400 and Dr Jon Fielding on the Tales of the City miniseries He portrayed Darren Richmond on the AMC television series The Killing Dr Alan Farragut in the SYFY series Helix and Det John Cardinal on CTVs Cardinal His most notable films include The Rocketeer Bram Stokers Dracula and Enough