Episode: 501 | Aired: January 03, 2006
J.D. has a hard time adjusting to his new job as attending physician. Turk has doubts about becoming a father.
Episode: 502 | Aired: January 03, 2006
Elliot confides in Carla and J.D. learns that the interns only laugh at his bad jokes out of fear.
Episode: 503 | Aired: January 10, 2006
Turk argues with a patient who wants to be hypnotized instead of anesthetized; J.D. ponders turning 30.
Episode: 504 | Aired: January 10, 2006
J.D.is charged with the impossible task of introducing Dr. Kelso at an awards banquet and tries to find out more about him.
Episode: 505 | Aired: January 17, 2006
Dr. Cox's Born Again Christian sister (Cheryl Hines) visits for Jack's baptism, and Cox confronts his issues with religion. J.D. helps the Janitor move.
Episode: 506 | Aired: January 17, 2006
J.D. is chosen over Dr. Cox by a patient, but struggles to handle the responsibility. Carla tries to organize the annual group photo; Turk and Elliot try to locate the source of a patients pain.
Episode: 507 | Aired: January 24, 2006
In the 100th episode, the characters confront their fears as they take on personas from the Wizard of Oz.
Episode: 508 | Aired: January 24, 2006
J.D., Turk, Carla and Elliot are interrogated after a patient dies on their watch. Jason Bateman guest stars.
Episode: 509 | Aired: February 07, 2006
J.D. tries to overcome his propensity for saying really inappropriate things on first dates, and Elliot enjoys her role as a mentor a bit too much. Mandy Moore guest stars.
Episode: 510 | Aired: February 07, 2006
J.D. turns narration duties over to Carla and suddenly starts saying all his thoughts out loud, threatening his relationship with his new crush (guest star Mandy Moore).
Episode: 511 | Aired: February 28, 2006
A favorite patient is in a coma and each staff member reacts to it differently. Turk suggests that Elliot and J.D. find booty calls.
Episode: 512 | Aired: February 28, 2006
J.D. struggles with his anger at Elliot's booty call, Elliot misplaces the written final statements of a deceased patient and the Janitor tries to keep a pet bird hidden.
Episode: 513 | Aired: March 07, 2006
J.D. and Dr. Cox struggle to cope after an intern's mistake leads to a patient's death. Ted and the Janitor team up to give Dr. Kelso a taste of his own medicine; Dave Foley guest stars.
Episode: 514 | Aired: March 14, 2006
Carla resorts to trickery to figure out if Turk is sterile. Dr. Cox is named 'The Best Doctor in The City.'
Episode: 515 | Aired: March 21, 2006
J.D. lectures Dr. Cox on the importance of going the extra mile for patients, but struggles to walk the walk: After vowing to shave his head in support of a patient undergoing chemo, J.D. starts dating a woman who loves his hair.
Episode: 516 | Aired: March 28, 2006
Turk and J.D. plan the ultimate surprise by hiding Carla's pregnancy from her, but the plan backfires.
Episode: 517 | Aired: April 04, 2006
Dr. Cox finds himself struggling to handle the interns after he and Jordan go on a double date with Elliot and Keith. Carla covers for Dr. Kelso at work while he mourns his dead dog.
Episode: 518 | Aired: April 11, 2006
J.D.'s slacker brother (Tom Cavanagh) is back in town. Carla and Turk discuss baby names.
Episode: 519 | Aired: April 18, 2006
The Janitor finds a way to keep J.D. out of the picture for the day; Dr. Cox and Turk accuse each other of not being hip.
Episode: 520 | Aired: April 25, 2006
J.D. and Dr. Cox bump into an annoying former patient. Elliot and Carla find out some unexpected news.
Episode: 521 | Aired: May 02, 2006
Carla rallies the gang around a depressed Dr. Cox after he makes a fatal mistake. Turk isnt too fond of his new boss.
Episode: 522 | Aired: May 09, 2006
Carla forces Turk to give up the same things she will give up while pregnant. Elliot clashes with Dr. Cox on his first day back at the hospital.
Episode: 523 | Aired: May 16, 2006
Elizabeth Banks guest stars as the hospital's sexiest urologist -- and J.D. falls for her. Elliot considers breaking up with her boyfriend.
Episode: 524 | Aired: May 16, 2006
Elliot unsuccessfully plans a baby shower for Carla, and someone from the staff announces she's pregnant.