Popularity: 3
| Creator: | David O'Leary |
|---|
| Name | Character | Episodes |
|---|---|---|
| Neal McDonough | General James Harding | 20 |
| Aidan Gillen | Dr. Allen Hynek | 20 |
| Michael Malarkey | Captain Michael Quinn | 20 |
| Michael Harney | General Hugh Valentine | 20 |
| Laura Mennell | Mimi Hynek | 20 |
| Ksenia Solo | Susie Miller | 20 |
| Nicholas Holmes | Joel Hynek | 12 |
| Jill Morrison | Faye | 11 |
| Ian Tracey | The Fixer | 7 |
| Robert John Burke | William Fairchild | 7 |
| Matt O'Leary | Lieutenant Henry Fuller | 6 |
| Currie Graham | Cal Miller | 5 |
| Jerod Haynes | Daniel Banks | 5 |
| Keir O'Donnell | Evan Blake | 4 |
| Ian Tracey | William | 3 |
| Michael Imperioli | Edward Rizzuto | 3 |
| Sofia Milos | Daria | 3 |
| Heather Doerksen | Donna Smith | 3 |
| Caspar Phillipson | John F. Kennedy | 3 |
| Spencer Garrett | General Ryan Blackstone | 2 |
| Zach McGowan | Duncan Booker | 2 |
| Thomas Kretschmann | Wernher von Braun | 1 |
| Christopher Heyerdahl | Edmund | 1 |
| Graham Greene | David | 1 |
| Bronson Pinchot | David Dubrovsky | 1 |
| Bob Gunton | President Harry S. Truman | 1 |
| Jason Burkart | Greg | 1 |
| Nolan Hupp | Eric | 1 |