| Mckenna Grace | ... | Penny Kirkman (3 episodes) |
| Alicia Nieves | ... | Alicia Nieves (3 episodes) |
| Scott Schaffer | ... | Scott Schaffer (3 episodes) |
| Virginia Madsen | ... | Kimble Hookstraten (3 episodes) |
| Jeff Lillico | ... | Wyatt (3 episodes) |
| Michael Kinney | ... | Acting Treasury Secretary (2 episodes) |
| Michael Gaston | ... | Governor John Royce (2 episodes) |
| Steven Lee Merkel | ... | Deputy CIA Director (2 episodes) |
| Jarrod MacLean | ... | First Responder (2 episodes) |
| Vanessa Smythe | ... | Reporter (2 episodes) |
| Mark Quigley | ... | FBI
(2 episodes) |
| Ashley Zukerman | ... | Peter MacLeish (2 episodes) |
| Arjay Smith | ... | Nolan (1 episode) |
| Alex Quijano | ... | Lawrence (1 episode) |
| Richard Bekins | ... | President Robert Richmond (1 episode) |
| Peter Outerbridge | ... | Charlie Langdon (1 episode) |
| Rothaford Gray | ... | Acting Defense Secretary (1 episode) |
| Krista Morin | ... | Acting FBI Director (1 episode) |
| Doug MacLeod | ... | Acting Secretary of State (1 episode) |
| Elias Zarou | ... | Ambassador Ahmed Fayad (1 episode) |
| Matt Smith | ... | Bomb Tech (1 episode) |
| Shawn Ahmed | ... | Bomb Tech (1 episode) |
| Tyler Burton | ... | Caleb (1 episode) |
| Khadijah Roberts-Abdullah | ... | Crying Woman (1 episode) |
| Darlene Cooke | ... | DC Appellate Judge (1 episode) |
| Adrian Griffin | ... | DC Cop (1 episode) |
| Perry Mucci | ... | FBI Tech (1 episode) |
| Jim Hamill | ... | Jim Hamill (1 episode) |
| Robin Cunningham | ... | Major Scott Cameron (1 episode) |
| Dan Duran | ... | News Reporter (1 episode) |
| Nadine Roden | ... | News Reporter (1 episode) |
| Rory O'Shea | ... | News Reporter (1 episode) |
| Brendan J. Rowland | ... | Secret Service Agent
(1 episode) |
| Troy Blundell | ... | Security Guard (1 episode) |
| JaNae Armogan | ... | Speechwriter (1 episode) |
| Kelly Penner | ... | Speechwriter (1 episode) |
| Scott Faulconbridge | ... | Terrified Man (1 episode) |
| Darrell Hicks | ... | Secret Service
(1 episode) |
| Shane Jarvis | ... | Secret Service Agent (1 episode) |
| Noam Jenkins | ... | FBI Agent
(1 episode) |
