Main Characters Doug McKenna 10 main appearances SoYun Pak 10 main appearances J. Randolph Bentley 8 main appearances Matt Edwards 8 main appearances Tara Coleman 8 main appearances Young Petra Andropov 8 main appearances Ellen Becker 8 main appearances Petra Andropov 7 main appearances
Recurring Guest Characters Dan Levine 8 guest appearances Samantha McKenna 8 guest appearances Stephen Haynes 6 guest appearances Colonel Shin 6 guest appearances Dae Pak 5 guest appearances Mike 5 guest appearances Jin Woo 4 guest appearances Ferguson 4 guest appearances Donald Matheson 4 guest appearances Nira Patel 3 guest appearances Dr. Gustav Meisner 3 guest appearances Colonel Li 3 guest appearances Dr. Martin Wells 3 guest appearances Dennis Kohler 3 guest appearances Tom Becker 3 guest appearances Spencer 3 guest appearances Anna Collier 3 guest appearances Leo Biller 3 guest appearances Yuri Leniov (Present Day) 3 guest appearances Carol Jane Devers 2 guest appearances ⇤ « 1 2 3 4 5 6 7 » ⇥