S18, E3: An explosion hospitalizes a pregnant guard, leading Detectives Ed Green (Jesse L. Martin) and Cyrus Lupo (Jeremy Sisto) to a Gen-Tech scientist whose lab is housed in the same building where the bomb is delivered. When the detectives discover the injured security guard had been one of the doctor's research subjects, ADAs Michael Cutter (Linus Roache) and Connie Rubirosa (Alana De La Garza) suspect the security guard's brother-in-law. Also starring: Sam Waterston, S. Epatha Merkerson, Linus Roache, and Alana De La Garza.