| Person | Type | Job | Role(s) |
|---|---|---|---|
 Sean Conant | Crew | Directing | Director, Producer, Writer, Cinematography |
Jim Conant | Crew | Production | Producer |
Luke Richards | Crew | Sound | Music |
Sheldon Bruck | Crew | Costume & Make-Up | Makeup Artist |
Erin McNeill | Crew | Costume & Make-Up | Makeup Artist |
Gary Zacuto | Crew | Sound | Sound Engineer |
 Aidan Quinn | Cast | Actor | Theodore Parker (voice) |
 Bob Gunton | Cast | Actor | William Herndon (voice) |
 Cary Elwes | Cast | Actor | John P. Jones (voice) |
 David Morse | Cast | Actor | Abraham Lincoln (voice) |
 David Strathairn | Cast | Actor | Ralph Waldo Emerson (voice) |
 Dermot Mulroney | Cast | Actor | Andrew Curtin (voice) |
 Ed Asner | Cast | Actor | Edward Everett (voice) |
 Gary Busey | Cast | Actor | John C. Calhoun (voice) |
 George Takei | Cast | Actor | Self |
 George W. Bush | Cast | Actor | Self (archive footage) |
 Jason Alexander | Cast | Actor | Noah Brooks (voice) |
 Keith David | Cast | Actor | Frederick Douglass (voice) |
 Kevin Conway | Cast | Actor | Daniel Webster (voice) |
 Lili Taylor | Cast | Actress | Emily Souder (voice) |
 Lois Smith | Cast | Actress | Elizabeth Crawford (voice) |
 Matthew Broderick | Cast | Actor | Reader |
 Michael C. Hall | Cast | Actor | Leonard Swett (voice) |
 Neal McDonough | Cast | Actor | Charles Sumner (voice) |
 Sam Elliott | Cast | Actor | Ward Hill Lamon (voice) |
 Tom Brokaw | Cast | Actor | Self |
Victor Garber | Cast | Actor | William Saunders (voice) |
 William Fichtner | Cast | Actor | John G. Nicolay (voice) |
 Henry Louis Gates, Jr. | Cast | Actor | Self |
 Laura Bush | Cast | Actress | Self |
 Maxwell Perry Cotton | Cast | Actor | Albertus McCreery (voice) |
 Zachary Gordon | Cast | Actor | Daniel Skelly (voice) |
Kelly Ayotte | Cast | Senator (NH) | |
| Person | Type | Job | Role(s) |
