After Birkhoff gets a tip from Shadowbot that Ari (recurring guest star PETER OUTERBRIDGE) is in New York, Nikita & Owen swoop in to pick him up before the FBI does. However, Ari reveals he planned everything for a chance to talk to Nikita. He tells her that Amanda has gone too far & is working with a terrorist who plans an attack on American soil. Ari wants 50 million dollars for the information that could lead to the terrorist's (guest star PITER MAREK -- Castle) capture. Nikita & Michael are stunned when Ryan considers paying the bribe. Meanwhile, Sean is jealous of Alex & Owen's relationship.