After nearly a month of Grey's-less Thursdays, ABC's Grey's Anatomy returns tonight with "Hook, Line and Sinner" - where Sloan (Eric Dane) becomes a granddaddy, Callie (Sara Ramirez) is still fighting with Arizona (Jessica Capshaw), and Teddy (Kim Raver) is not happy about Derek (Patrick Dempsey) inviting a kick-ass cardiothoracic surgeon to Seattle Grace-Mercy West.

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Tonight, Sloan returns to Mark's apartment since she's going into labor, which is an awesome idea because everyone in the place is a surgeon. After the successful delivery, she's thinking of maybe keeping the baby instead of putting it up for adoption. And oh: Little, little Sloan is so cute! Clips after the jump: