| James Lurie | ... | Narrator (voice) | |
| Nicole Waguespack | ... | Herself, PhD, University of Wyoming | |
| David J. Meltzer | ... | Himself, PhD, Southern Methodist University | |
| David George | ... | Himself, PhD, Saint Anselm College | |
| Pat Lubinski | ... | Himself, PhD, Central Washington University | |
| Christopher A. Shaw | ... | Himself, George C. Page Museum at the La Brea Tar Pits | |
| John Johnson | ... | Himself, PhD, Santa Barbara Museum of Natural History | |
| Jake Shapley | ... | Himself, Central Washington University | |
| Todd Surovell | ... | Himself, PhD, University of Wyoming | |
| Darrin Lowery | ... | Himself, Washington College | |
| Dennis Stanford | ... | Himself, PhD, Smithsonian Institute | |
| Peter Clark | ... | Himself, PhD, Oregon State University | |
| Ed Brook | ... | Himself, PhD, Oregon State University | |
| Allen West | ... | Himself, Dr., geophysicist | |
| James P. Kennett | ... | Himself, PhD, University of California, Santa Barbara (as James Kennett) | |
| Luann Becker | ... | Herself, PhD, University of California, Santa Barbara | |
| Mark Stiger | ... | Himself, PhD, Western State College of Colorado | |
| Jennifer Antkowiak | ... | Paleo Woman | |
| Ted Arabian | |||
| Zoe Reich Aviles | |||
| Vicky Bakis | ... | Paleo Indian | |
| Bruce Bausk | |||
| Paul Blumenfeld | ... | Paleo Man | |
| TJ Cencula | ... | Paleo Man | |
| Megan Coleman | |||
| Robert Cooney | ... | Paleo-Indian Hunter 2 | |
| Andreas Cuellar | |||
| Brian Danner | ... | Paleo Man | |
| Carla Dorato | |||
| Lizzie Dorato | |||
| Geoff Edgers | |||
| Anna Rose Goldstein | |||
| Myles Goldstein | |||
| Nathan Hedrick | ... | Paleo Man | |
| Lila Hempel-Edgers | |||
| Michael Frank | |||
| Christy Hauptman | |||
| Emilie Hurley | |||
| Kate Hurley | |||
| Shira Kagan-Shafman | |||
| Jay Levy | |||
| Rusty Locke | ... | Paleo Man | |
| Owen Niles | |||
| Patricia Noonan | |||
| Rebecca Padrusch | |||
| Lily Padrusch | |||
| Ian Stoker-Long | ... | Paleo Man in Snow | |
| William Vellardochia | |||
| Anowon Weedon | |||
| Russell Woron-Simons | ... | Paleo Man |
Directed by | |||
| David Padrusch | (as David W. Padrusch) | ||
Writing credits(in alphabetical order) | ||
| David Padrusch | written by | |
| Ian Stoker-Long | written by | |
Produced by | |||
| Alicia Balestrino | .... | post production producer | |
| Karen Barrett | .... | executive post-producer | |
| Gabriel Gornell | .... | producer | |
| Alan Grazioso | .... | line producer | |
| Meredith Honig | .... | associate producer | |
| David Padrusch | .... | executive producer | |
Original Music by | |||
| Michael Richard Plowman | |||
Cinematography by | |||
| Thomas Danielczik | |||
Film Editing by | |||
| Jonathan Howard | |||
Production Design by | |||
| Scott Lefton | |||
Art Direction by | |||
| Scott Lefton | |||
Costume Design by | |||
| Christy Marie Hauptman | |||
Makeup Department | |||
| Liz Pisano | .... | hair technician | |
| Liz Pisano | .... | makeup effects co-department head | |
Art Department | |||
| David D. Gardner II | .... | assistant production designer | |
| Talia Lefton | .... | assistant production designer | |
Sound Department | |||
| Allan Gus | .... | supervising sound editor | |
Special Effects by | |||
| Hiroe Goto | .... | special effects crew | |
| Holli Martinez | .... | special effects crew | |
| Gregg Mike | .... | special effects | |
| Freling Paul | .... | special effects | |
| Tate Steinsiek | .... | special effects coordinator | |
| Chris Wirth | .... | special effects supervisor | |
| Phil Young | .... | special effects crew | |
Visual Effects by | |||
| Land Dan | .... | visual effects | |
| Hall Gabe | .... | visual effects | |
| Jovich Jon | .... | visual effects | |
| John T. Miller | .... | creative director | |
| Ari Novak | .... | visual effects producer | |
| Chris Wirth | .... | creative director | |
Stunts | |||
| TJ Cencula | .... | utility stunts | |
| Brian Danner | .... | utility stunts: fight choreography | |
| Nathan Hedrick | .... | utility stunts | |
| Rusty Locke | .... | utility stunts | |
Camera and Electrical Department | |||
| Clinton McMahon | .... | best boy grip | |
Editorial Department | |||
| Ted Pishko | .... | on-line editor | |
| Dino Regas | .... | colorist | |
Other crew | |||
| Laura Jean Bransky | .... | production assistant | |
| James Chick | .... | production assistant | |
| Austin Grebenc | .... | production assistant | |
| Kimmie Johnson | .... | production assistant | |
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| Full cast and crew | Company credits | External reviews |
| IMDb Documentary section | IMDb USA section |