| Name | Character | Episodes |
|---|---|---|
| Leslie Kean | Self - Investigative Journalist | 4 |
| George Knapp | Self - Investigative Journalist | 3 |
| Barack Obama | Self (archive footage) | 2 |
| Harry Reid | Self - Former Senate Majority Leader | 2 |
| Luis Elizondo | Self (archive footage) | 2 |
| Brandon Harris | Self - Contributor, The New Yorker | 2 |
| Charlie Rose | Self (archive footage) | 1 |
| Tom DeLonge | Self (archive footage) | 1 |
| Harry S. Truman | Self (archive footage) | 1 |