Question: did the bomb really go off in grey's anatomy

Answer: Yes, 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.