When Joseph accidentally deletes the department personnel files the whole team are forced to redo their aptitude tests. Afraid of having to take a polygraph, Jerry manoeuvres to take over and run the test procedure himself. But when Jerry suspects that Christine may be hiding feelings for him he reluctantly agrees to taking the polygraph providing Joseph can secretly twist the results.
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
Michael is behind the hit on Bill, but can’t afford to pay for it, so he accepts a dope run with the bikers for cash. Ted, hoping to dig up dirt on Bill’s murder, puts surveillance on Michael. Mary, in order to placate superiors about Reardon, offers to get an undercover operator inside Reardon’s operation. She recruits Tina, a stripper, who gets a job inside Reardon’s strip-club, “The Chickadee.” Meanwhile, Mary’s wire room finds out about an arms shipment to Africa that is tied to a local broker, Bingham. Reardon finds out about Michael’s debt for the hit, and pays it off to smooth things over. Mary uses Reardon’s connection to Bingham to scare him into thinking the police know about his shipment. Mary’s wire room picks up more info as a panicked Bingham calls his connections. Michael finds out about the surveillance on him and is able to evade it.