Nuke It Out (E07)

As Marcus (Andre Braugher) and Sam (Scott Speedman) hunt for the traitor in their ranks who stole their nuclear launch key, Prosser (Robert Patrick) disobeys orders and starts a small war he can't control. Meanwhile Grace and James must work together to defuse a dangerous situation, while back in D.C. Christine is indicted as Sam's co-conspirator. (iTunes)