When it comes to the kids under his care, Dr. Alex Karev is as protective as a mama bear with her cubs. And as Greys Anatomy fans have seen before, hes willing to toe lines or even cross them to give them the best care.

But in this sneak peek from Thursdays new episode, Alex (Justin Chambers) runs into a new force of opposition Eliza Minnick (Marika Dominczyk). A boy named Liam comes into the hospital with a tumor, but his parents refuse surgery due to their religious beliefs.

The kid took a train all by himself to ask us for help, Alex pleads toEliza. Actual help, not prayers and olive oil on his head.

Eliza doesnt back down. No neurosurgeon will cut into a kids skull without parental consent, because its illegal, she replies.

And then, twisting the knife a bit, she notes that with his history assaulting DeLuca and almost going to prison for it perhaps he shouldnt be crossing any lines right now.

Greys Anatomy airs Thursdays at 8 p.m. on ABC.

Read More From Yahoo TV:

Follow this link:
'Grey's Anatomy' Sneak Peek: Alex Battles Eliza Over a Kid's Rights ... - Yahoo TV (blog)