Grey's Anatomy: Callie and Arizona Are Heading for a Nasty Custody Battle

Gun control is heavy on the mind of the folks at Grey's Anatomy in Thursday's episode, in which the central case is about an 8-year-old boy accidentally shot while on a playdate.

Kids in general play a huge component of the installment, with Callie (Sara Ramirez) and Arizona (Jessica Capshaw) facing off over Callie's proposal to take Sofia with her and Penny (Samantha Sloyan) to New York, and April (Sarah Drew) and Jackson (Jesse Williams) reaching a near-friendly truce when it comes to an upcoming prenatal appointment.

The Calzona drama begins when they meet for what starts as an amiable coffee, which turns south when Callie shares that she's found an apartment in New York - and some schools for Sofia.

April, meanwhile, deals with two frantic mothers who have beaten their sons to the hospital, knowing that one of their boys is the victim of a gunshot wound, but it's unclear which one.

Sure enough, the two boys show up seconds later - the victim, Brandon, in an ambulance with his spinal cord pierced by a bullet, and the other boy, Peter, who's brought to the hospital in a police car.

Once the boys' babysitter comes, she reveals that she left the room for a minute, during which time they found Brandon's mother's gun, and were playing with it when it went off.

Brandon isn't doing so well on the operating table, and the mothers start arguing- with the victim's mother blaming the shooter's mother for the fact that he pulled out her gun, and the shooter's mother blaming the victim's mother for owning a gun in the first place.

Later, she and Alex break the news to his parents that it's unlikely he'll ever walk again, even with the assistance of physical and occupational therapy.

Everyone's been shaken up by the tiny gunshot victim, especially Maggie, who grills the babysitter about why she wasn't watching the boys more closely and then later calls the daycare to check up on her nephews and niece.