Jack Shearer

In 2030, Ted tells his children the story of how he met their mother, beginning back in 2005 with Marshall and Lily’s engagement. Ted, eager to find his soulmate, meets Robin, and sets his sights on marrying her.

An outbreak of a sexually transmitted disease affects several members of the hospital staff, prompting Chief Webber to call a meeting. Meanwhile, the chief reluctantly confides to Dr. (Derek) Shepherd about his own medical concerns; Izzie and Cristina are worried by a patient's wife and daughter who are at odds over his care; Burke treats Bill, a college buddy whose medical diagnosis raises some questions regarding his wife's actions; and, just as Meredith and Derek grow more intimate, a bombshell is dropped.

Malcolm and his brothers build the ultimate stealth weapon, while Hal and Lois battle a speeding car that terrorizes their neighborhood.

J.D. (Zach Braff) suffers from guilt-induced insomnia after Carla (Judy Reyes) points out that he avoided a terminally ill patient because the man was a difficult pill. Meanwhile, Dr. Cox' (John C. McGinley) ex-wife Jordan (guest-star Christa Miller) interferes in his new relationship with medical student Kristin (guest star Kelli Williams, "The Practice"), and Turk (Donald Faison) and Elliot (Sarah Chalke) obsess over evidence that Dr. Kelso (Ken Jenkins) might be concealing a musical past.

Talk of killing patients throws the staff into a frenzy; Carla tries to get rid of Turk's stuffed dog; Molly interferes with Elliot's efforts to get a patient a heart valve.