Main Characters Alex O'Connor 13 main appearances Katya O'Connor 13 main appearances Natalie O'Connor 13 main appearances Victor Dobrynin 13 main appearances Mark O'Connor 13 main appearances Sam Luttrell 12 main appearances Sarah O'Connor 11 main appearances Julia Marcus 1 main appearances
Recurring Guest Characters Arkady Isakof 12 guest appearances Michelle Prado 8 guest appearances Special Agent Brock 8 guest appearances Oscar Christoph 7 guest appearances Roman 7 guest appearances Agent 6 guest appearances Special Agent Faber 5 guest appearances FBI Team Leader 3 guest appearances Richie Diberno 3 guest appearances NCS Director 2 guest appearances Mr. Palmer 2 guest appearances Vaso Matiashvilli 2 guest appearances FBI Director 2 guest appearances Scott Tolliver 2 guest appearances Oleg Zhulov 2 guest appearances Elizabeth Simpson 2 guest appearances General Sergeyev 2 guest appearances Maid 2 guest appearances Undercover Cop 2 guest appearances FBI Agent 2 guest appearances ⇤ « 1 2 3 4 5 6 » ⇥