CyberCom investigates a terrorist suicide bombing at a U.S. Marine base and learns a new, chemically undetectable bomb material is being consumed. Meanwhile, Riley is forced to make a drastic decision when she finds Gabriel unable to complete a task.

Cast: Tomas Arana, John Billingsley, P.J. Byrne, Tom Connolly, Yorgo Constantine, Joseph David-Jones, Marg Helgenberger, Josh Holloway, Nicholas Massouh, Meghan Ory, Michael Rady, Lance Reddick, Hrach Titizian, Daniel Zolghadri