The actor is currently recurring on Showtime's 'Shameless.'

Dermot Mulroney is checking in to CBS' Bunker Hill.

The Shameless actor has been tapped to topline the network's Jason Katims medical drama, The Hollywood Reporter has learned.

Bunker Hill follows a young Silicon Valley tech titan (Augustus Prew) who enlists a veteran surgeon with a controversial past in starting a hospital with a cutting-edge, "new school" approach to medicine.

Mulroney will portray Walter Wallace, a brilliant surgeon committed to saving lives who might care a little too much about his patients. He joins a cast that also includes Brenda Song as Angie, a programmer at the hospital.

The casting marks Mulroney's latest broadcast gig following NBC's Crisis and recurring roles on Fox's New Girl and CBS' Extant. His cable and streamer roles include HBO's Enlightened and Amazon's Mozart in the Jungle. On the film side, his credits include My Best Friend's Wedding, August: Osage County and The Family Tree. Mulroney is repped by WME and Jackoway Tyerman.

Friday Night Lights and Parenthood alum Katims penned the script for Bunker Hill and will executive produce alongside his Universal Television-based True Jack topper Michelle Lee. David Semel (Madam Secretary) also will exec produce and direct the pilot. The drama, redeveloped from last pilot season, is a co-production between Universal Television and CBS Television Studios.

Keep up with all the latest pickups, castings and eventual series orders with THR's handy guide to pilot season.