Billy Campbell is an American actor best known for his starring role in the television series Once and Again (1999-2002), as well as for his role as a gay gynaecologist, Dr. Jon Philip Fielding, in all three of the television mini-series adaptations of Armistead Maupin's novels of the same title: Tales of the City, More Tales of the City, and Further Tales of the City.
He is also known for his role as Carter Buckley in the second season of The O.C., and for his starring role as Jordan Collier on the sci-fi series The 4400 (from 2004-2007).
He also starred as mayoral candidate Darren Richmond in the mystery drama television series The Killing, from 2011-2012.
His film credits include The Rocketeer, Bram Stoker's Dracula and Enough.
Campbell was the second choice of the producers of Star Trek: The Next Generation to play the role of William Riker, but lost the role to Jonathan Frakes. Campbell would later appear as a guest star in the second season episode "The Outrageous Okona".
His first prominent role was that of Luke Fuller, Steven Carrington's lover, on Dynasty, in 1984/5. This role is also oddly notable in that Campbell was one of only two cast members whose characters actually did die in the infamous Dynasty Wedding Massacre in 1985 (the other victim being Ali MacGraw's character, Lady Ashley Mitchell).
In 2000, he was named one of the "World's 50 Most Beautiful People" by People magazine.
Recently, he has made a successful career out of playing villains, such as a messianic abduction survivor on The 4400 (although this character is not necessarily villainous), a college professor accused of raping a student (played by a fellow Law & Order: Special Victims Unit special guest star, Shannyn Sossamon) in Law & Order: Special Victims Unit, and serial killer Ted Bundy in the made-for-TV movie The Stranger Beside Me, based on true crime author Ann Rule's book.
He also has appeared as a serial killer who defends himself in the television series Shark, in 2007.