Doctor Christopher Duncan Turk, who's mostly known as just Turk, is played by Donald Faison and is J.D.'s best friend on Scrubs. He is a surgeon at Sacred Heart and quickly dates and marries one of the nurses there, Carla Espinosa. He and Carla then have a baby Isabella together.
Turk loves to dance and is definitely one of the best surgeons and makes it well known. His man love with J.D. is one of the best parts of the show.
[Turk is in Kelso's spot]
Dr. Kelso: Nice spot.
Turk: Yes, sir... it is.
Dr. Kelso: I usually try to get out here for lunch every day at 12:30.
Turk: You don't say...
Dr. Kelso: Yep. Every day. 12:30. For twenty-three years
Turk: Wow, she's using the "L word" now.
J.D.: Yeeeaaah, but we're not really that serious.