Morena Baccarin

TNT’s ’Heartland’ cast set

Treat Williams, last seen playing a doctor on The WB’s "Everwood," will don a lab coat again to play the lead doctor in the TNT pilot "Heartland," written by Mt. Lebanon native David Hollander ("The Guardian").

The proposed series is set in the transplant surgery community, and Williams will play a transplant surgeon. Other actors in lead roles include Kari Matchett ("Invasion"), Danielle Nicolet ("Second Time Around") and Morena Baccarin ("Firefly").

"Heartland" is tentatively set in Pittsburgh, but that could change. Regardless, Hollander said Williams’ character "is an insane Pittsburgh sports fan, if nothing else."