SISTER, SISTER -- When a young woman is found bludgeoned into a coma, Detectives Briscoe (Jerry Orbach) and Green (Jesse L. Martin) believe that an employee (guest star Sebastian Roche) in the state comptroller's office is the prime culprit -- especially when they discover that their suspect was the boyfriend of the victim's sister who disappeared three years earlier. But as a confident McCoy (Sam Waterston) and Carmichael (Angie Harmon) sift through the puzzle, their key piece of evidence -- matching DNA found at the crime scene -- may not be enough for a conviction when another witness steps forward. Steven Hill and S. Epatha Merkerson also star.

Season 10 | Episode 7

Jerry Orbach

Detective Lennie Briscoe

Angie Harmon

Assistant District Attorney Abbie Carmichael

Sam Waterston

Executive Assistant District Attorney Jack McCoy

S.Epatha Merkerson

Lt. Van Buren

Jesse L. Martin

Detective "Eddie" Edward Green

Benjamin Bratt

Detective Reynaldo "Rey" Curtis

Dianne Wiest

District Attorney Nora Lewin

Steven Hill

District Attorney Adam Schiff