| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Anthony Fiorino | Crew | Production | Executive Producer | 16 |
 Kevin Burns | Crew | Production | Executive Producer, Writer | 16 |
 William Shatner | Crew | Production | Executive Producer | 16 |
Kim Sheerin | Crew | Production | Executive Producer | 16 |
 Arthur Conan Doyle | Cast | Actor | Self (archive footage) | 1 |
 Brian Jones | Cast | Actor | Self (archive footage) | 1 |
 Harry Houdini | Cast | Actor | Self (archive footage) | 1 |
 J. Edgar Hoover | Cast | Actor | Self (archive footage) | 1 |
 Janis Joplin | Cast | Actress | Self (archive footage) | 1 |
 Jean-Claude Van Damme | Cast | Actor | Self | 1 |
 Jim Jones | Cast | Actor | Self (archive footage) | 1 |
 Jim Morrison | Cast | Actor | Self (archive footage) | 1 |
 Jimi Hendrix | Cast | Actor | Self (archive footage) | 1 |
 Joseph Stalin | Cast | Actor | Self (archive footage) | 1 |
 Jules Verne | Cast | Actor | archivefootage | 1 |
 Kurt Cobain | Cast | Actor | Self (archive footage) | 1 |
 Michael Jackson | Cast | Actor | Self (archive footage) | 1 |
 Michio Kaku | Cast | Actor | Self - Dr. Theoretical Physics Professor | 47 |
 Tony Curtis | Cast | Actor | Self (archive footage) | 1 |
 Czar Nicholas II of Russia | Cast | Actor | Self (archive footage) | 1 |
 Vladimir Lenin | Cast | Actor | Self (archive footage) | 1 |
William Shatner | Cast | Actor | Self - Host | 89 |
 Amy Winehouse | Cast | Actress | Self (archive footage) | 1 |
 Elon Musk | Cast | Actor | Self | 2 |
 Nikola Tesla | Cast | Actor | archivefootage | 1 |
Tsarina Alexandra | Cast | Actress | Self (archive footage) | 1 |
Helen Morrison | Cast | Actress | Self - Forensic Psychiatrist | 1 |
 Grand Duchess Anastasia | Cast | Actress | Self (archive footage) | 1 |
 Leo J. Ryan | Cast | Actor | Self (archive footage) | 1 |
 Frank Lee Morris | Cast | Actor | Self (archive footage) | 1 |
 Allen Clayton West | Cast | Actor | Self (archive footage) | 1 |
 Clarence Anglin | Cast | Actor | Self (archive footage) | 1 |
 John William Anglin | Cast | Actor | Self (archive footage) | 1 |
 Karen Kuzma | Cast | Actress | Self - Sister of John Wayne Gacy | 1 |
| Person | Type | Job | Role(s) | Episodes |
