Actress Hope Davis may be headed to an interesting guest spot over at NBC’s Law & Order: SVU, but the gig also constitutes somewhat of an In Treatment reunion.

The HBO drama, In Treatment, which stars Gabriel Byrne, was written by Warren Leight, who is the current showrunner of SVU. Hope Davis played Mia for several episodes of season 2.

THR has learned that Davis will pop up on SVU as Viola Mesner, the mother of a very trouble boy named Henry. Ethan Cutkosky of Shameless will portray her son.

“Julie Martin and I co-wrote this one; it’s a tough episode about a mother who confronts the possibility that her 10-year-old son is just … wired wrong,” Leight told THR. “We sent it out to Hope and I crossed my fingers because I really couldn’t think of anyone else who could play it. Working with Hope on In Treatment was one of the great joys of my career. I’m thrilled I get to work with her again.”

It’s always rewarding when someone wants to work with you again. This one sounds like a meaty episode, but then, so many of them revolve around challenging issues and situations. It’s what we’ve come to expect after over a decade of SVU.

Davis has been a hot commodity of late. When Leight says he crossed his fingers, he’s not exaggerating. She could have easily taken something else. She has appeared on The Newsroom, Mildred Pierce and The Special Relationship, where she played the role of Mrs. Hillary Clinton.

SVU fans can also look forward to upcoming guest roles from Homeland‘s David Marciano and The Walking Dead‘s Lauren Cohan. Maggie is coming to town! That doesn’t seem right unless Glenn comes, too. Wink, wink, wink.

Ready for a controversial episode? The one these two actors share is on the topic of “legitimate rape”. Yikes!

SVU airs Wednesdays at 9 p.m. on NBC.