My Brother, My Keeper - Season 2
When an old colleague of Dr. Kelso, Dr. Townsend comes back, he originally brings joy to the hospital, causing JD and the gang to name him the anti-Kelso. Sadly it is not long before people realise that his treatment methods are out of date and dangerous, causing Kelso to fire his best friend.
Clip via: Ryan Lewis
Courtney Cox
My Jerks, My Last Words, My Saving Grace, Season 8 Cox's guest appearance on Scrubs helped to fill a giant Friends-shaped hole in our hearts. She plays the new (but not for long) chief of medicine, Dr. Maddox, who initially seems like a good doctor who cares for her patients but soon turns out to be even worse than Dr. Kelso. She's quite the ice queen, which is probably why she and Jordan get on so well. Clip via Alexander KaryRyan Reynolds
My Dream Job - Season 2 Long before Deadpool and just after Van Wilder, Ryan Reynolds played Spence, Turk and JD's college friend. In a flashback we discover that Spence is responsible for JD's hairstyle. After the three go out for a heavy night of drinking Spence accidentally reveals to Dr. Cox that he is Jordan's baby's father. Clip via The Galmeister's HangoutJohn Ritter
My Lucky Day - My Old Man, Season 1/Season 2
Ritter plays JD's dad Sam, whom his son is later named after. When Sam comes to visit, JD gets annoyed because of his dad's attempt at being one of the guys. Though his time on the show was brief, it was very memorable, and the episode which shows JD and his brother Dan dealing with the loss of their dad was dedicated to Ritter, who died in September 2003.
Clip via blue1231
