Sayra Player

After Danny's brother-in-law, Jimmy (Kevin Dillon), gets caught up with the mob and steals Danny's credit card, Danny forces Jimmy to take down the mobsters with Baez's help. Also, Frank has Erin and Anthony investigate if his old partner, Lenny (Treat Williams), is truly guilty of a crime and Jamie is approached by Tariq (Rene Ifrah), an officer who wants his help getting reassigned from his undercover assignment at a mosque.

A Russian emigre is poisoned and what appears to be an act of terrorism turns into a revenge plot -- Karl Rostov (guest star Michael Aronov) dies at the hospital after symptoms of a severe stomach flu. The FBI are under the impression that they are dealing with terrorism until the medical examiner finds Ricin in Rostov's body. As Detectives Ed Green (Jesse L. Martin) and Nina Cassady (Milena Govich) dig further a mystery surrounding Rostov's life is unraveled. S. Epatha Merkerson, Fred Dalton Thompson and Alana De La Garza also star.