Mle Chester

Frank pushes to find evidence against a suspected cop killer who shot one of Henry's fellow officers years ago. Meanwhile, Danny and Baez investigate a string of murders involving adult film stars.

When Elizabeth discovers that a terrorist bombing at an Illinois coffee shop was funded by someone with close ties to the Saudi government, she makes a bold move after the Saudi ambassador refuses to bring the man to justice. Also, Matt refuses to issue a statement when news breaks that he and the bomber are linked to the same mosque, and Henry reaches out to Dmitri when he hears he's having trouble adjusting to his new life in Phoenix. Chris Petrovski reprises his guest role as Dmitri Petrov. (TV-14 L, V)