11/16/2012 04:16 pm ET

Constance Zimmer Joins 'Grey's Anatomy' Cast And More Casting News

Constance Zimmer is bringing some new energy to Seattle Grace.

The "Entourage" actress is stopping by "Grey's Anatomy" as Dr. Cahill, a “confident, self-possessed, laser-focused professional with a wicked sense of humor," according to EW.

TVLine's Michael Ausiello surmised that Zimmer's character might be the new love interest "Grey's" creator Shonda Rhimes confirmed Alex (Justin Chambers) will be getting in Season 9.

In addition to "Entourage," Zimmer's recent TV appearances include "The New Normal" and "Love Bites."

In other casting news...

Mykelti Williamson and Frances Fisher are headed to "Touch." The "24" vet will play an LAPD detective, while Fisher will appear as the head of Aster Corps on the action-packed CBS series. [TVLine]

Marianne Jean-Baptiste is headed back to "Private Practice" in December. Jean-Baptiste will reprise her role as Gabi when she bumps into Violet (Amy Brenneman) at the hospital. [THR]

Jesse Plemons has joined HBO's "The Missionary." The "Friday Night Lights" vet has joined the cast as Sherwood Elbridge, a corrupt executive at Coca-Cola. [Deadline]

2012 Renewal Index: Canceled, Safe and on the Bubble Shows