On the last episode of 'Grey's Anatomy' (Thu., 9PM ET on ABC), a daughter unexpectedly showed up on her father's doorstep. To further complicate things, the daughter was pregnant. Now, to complicate things even more, that same daughter is going into labor -- on the floor of her dad's apartment.

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On the last episode of 'Grey's Anatomy' (Thu., 9PM ET on ABC), a daughter unexpectedly showed up on her father's doorstep. To further complicate things, the daughter was pregnant. Now, to complicate things even more, that same daughter is going into labor -- on the floor of her dad's apartment.

Sloan (Leven Rambin) is giving birth. Her father Mark (Eric Dane) is trying to help her. Friends Teddy, Callie and Arizona also show up to help (played by Kim Raver, Sara Ramírez and Jessica Capshaw). But even if the the whole thing goes off without a hitch, Sloan still wants to give the baby up for adoption. Is Mark ready to be a grandpa? Or will he never even get to know Sloan's new son?