Greg Grunberg Greg Grunberg

TV vet Greg Grunberg has landed a guest-starring role on CSI, Entertainment Weekly reports.

The Heroes and Alias alum will play Len Bryant, a white-collar everyman fighting addiction at a high-end rehab facility. He is determined to get sober in order to win back his children. Grunberg's episode will air in early November.

Returning fall shows: Where we left off and what's next

The actor is also known for his roles on Felicity and, most recently, Masters of Sex.

CSI returns Sunday, Sept. 28 at 10/9c on CBS.

(Full disclosure: is owned by CBS.)

Watch Jennie Garth and Tori Spelling rank their Beverly Hills, 90210 boyfriends in chronological order: