<P> "As We Know It" is the seventeenth episode of the second season of the American television medical drama Grey's Anatomy . The episode was written by Shonda Rhimes and was directed by Peter Horton . It originally aired on the American Broadcasting Company (ABC), on February 12, 2006, running for 43: 06 min . This episode is the second of a two - part story . </P> <P> The episode (along with its first part, "It's the end of the world") secured writer Shonda Rhimes a 2006 Emmy Award nomination in the "Writing for a drama series" category . </P> <P> Dr. Bailey is in labor, and without her husband Tucker Jones by her side, she refuses to push so she can give birth . George works with Addison to convince Bailey to have the baby . He finally gets through to Bailey by giving her the motivation that she needs, and ultimately he holds her while she delivers the baby . Izzie and Alex have sex again . Chief Richard Webber is under a lot of stress from everything that's been going on, and it is believed that he is having a heart attack, which lures his wife Adele to the hospita (anxiety attack)). Dr. Bailey's husband goes into cardiac arrest . Meredith finally removes the explosive from the patient, and Dylan, the leader of the bomb squad, carries it away . Meredith steps out of the operating room into the hallway, curiously watching Dylan walk away with the explosive, and at that moment, the bomb explodes, killing Dylan and a second bomb squad member . Meredith is knocked unconscious by the explosion . There is a revival of the "shower scene" from the first part, but with a more serious tone: the fully clothed Izzie and Cristina wash blood off of a stunned Meredith as George looks on . Dr. Bailey's husband and the man who had the explosive embedded in his body both survive . At the end of the episode, Preston and Derek become friends, overcoming their initial rivalry in the series beginning, and call each other by their first names . Cristina says "I love you, too" to a sleeping Preston . Derek comes to visit Meredith and says, "You almost died today," and Meredith tells him that she can't remember their last kiss . Derek recalls the kiss for her, telling her that she "smelled like some kind of flower," which Meredith says was lavender, and then he leaves . </P> <P> The episode's title refers to "It's the End of the World as We Know It (And I Feel Fine)" by R.E.M. . </P>

Who dies in the bomb explosion in grey's anatomy
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