When Barney loses his "mojo," he attends the Victoria's Secret Fall Fashion Show after-party to get himself back on track, but his smooth operating skills are put to the test when he meets supermodel Heidi Klum.
While planning his birthday, J.D. finds a list of things he wanted to accomplish before he turned 30. He begins by entering a triathlon.
J.D. and Elliot try to help Turk and Carla through a rocky patch in their marriage; Dr. Cox challenges Dr. Kelso to lead by example and take on a few patients of his own.
Turk tells Carla and J.D. to decide between themselves who is responsible for their kiss.
J.D. asks Dr. Cox for lunch but runs into annoying former patient Jill Tracy, who unexpectedly teaches him something about responsibility.
