Event Year: 2005

Cristina and Meredith try to figure out if Cristina should tell Burke that she's pregnant right before Cristina faces an emergency. Alex and Izzie get closer while Meredith's mother gets too close.

There's tension between Meredith and Addison. We find out why Derek and Addison aren't together. Bailey puts George on an impossible case. The rest of the interns operate on a family that was just in a car accident.

Picks up where the last episode left off. Meredith attempts to work with Addison Shepard. George is pimped out to relay the hospital gossip back to Webber. Meredith and Cristina relate at Emerald City Bar about what dating their respective attendings is like. Cristina ponders her relationship with Burke while trying to make a decision. Meredith is devastated by the latest blow to her love life. Meanwhile, Joe the bartender collapses.

A sexually transmitted disease breaks out and affects several members of the hospital staff. Chief Webber promptly calls a meeting. Meanwhile, the chief reluctantly tells Dr. Derek Shepherd about his own medical concerns. Izzie and Cristina worry about a patient's wife and daughter who can't agree on his care. Burke treats his college buddy Bill, whose medical diagnosis raises some questions regarding his wife's actions. Then just as Meredith and Derek grow more intimate, a surprise is revealed.