Recurring Guest Characters Vaughn Hillyard 5 guest appearances Joyce Vance 4 guest appearances Guest Host 3 guest appearances Guest Host 3 guest appearances Guest Host 3 guest appearances Catherine A. Christian 3 guest appearances Monica Alba 3 guest appearances Philip Rucker 2 guest appearances Ken Dilanian 2 guest appearances Ryan Nobles 2 guest appearances James Stavridis 2 guest appearances Michael McFaul 2 guest appearances Yasmin Vossoughian 2 guest appearances Lisa Rubin 2 guest appearances Guest Host 2 guest appearances Peter Baker 2 guest appearances Andrew Weissmann 2 guest appearances Chuck Rosenberg 2 guest appearances Ashley Parker 2 guest appearances Katie Phang 1 guest appearances ⇤ « 1 2 3 » ⇥