Popularity: 5
| Creator: |
|---|
| Name | Character | Episodes |
|---|---|---|
| Mike Rowe | Narrator | 30 |
| Erik Dellums | Himself - Narrator | 16 |
| Erik Dellums | Self - Narrator | 9 |
| Mike Rowe | Himself - Narrator | 8 |
| Michio Kaku | Himself | 6 |
| Lawrence Krauss | Himself | 6 |
| Albert Einstein | Himself (Archive footage) | 5 |
| Richard Lintern | Himself - Narrator | 1 |