Cast (in credits order)
| Jake Gyllenhaal | ... | Self - Narrator (voice) | |
| Clive D.L. Wynne | ... | Self - Author, Dog is Love (as Clive Wynne Ph.D.) | |
| Xephos | ... | Self - Clive D. L. Wynne's Dog | |
| Stanley Coren | ... | Self - Author, The Intelligence of Dogs (as Stanley Coren Ph.D.) | |
| Christopher Schell | ... | Self - Evolutionary Biologist (as Christopher Schell Ph.D.) | |
| Deja | ... | Self - Christopher Schell's Dog | |
| Lyudmila Trut | ... | Self - Head Researcher, Novosibirsk Institute | |
| Cynthia Otto | ... | Self - Director, Penn Vet Working Dog Center (as Dr. Cynthia Otto) | |
| Maria Clarke | ... | Self - Parent of Two Autistic Children | |
| Joe Clarke | ... | Self - Parent of Two Autistic Children | |
| Meadow Clarke | ... | Self - Autistic Child with Mobility Support Dog | |
| Colton Clarke | ... | Self - Autistic Child with Mobility Support Dog | |
| Ollie | ... | Self - Mobility Support Dog | |
| Una | ... | Self - Mobility Support Dog | |
| Gregory Berns | ... | Self - Neuroscientist | |
| Rest of cast listed alphabetically: | |||
| Dmitry Belyaev | ... | Self - Geneticist (archive footage) | |
Produced by
| Ora Dekornfeld | ... | producer |
| Dan DiStefano | ... | executive producer |
| Arsh Harjani | ... | Associate Archival Producer |
Cinematography by
| Raffaele Di Nicola | ||
Editing by
| Brian Redondo | ||
Animation Department
| Lynn Hwirin Park | ... | motion graphic designer |
Editorial Department
| Soren Martin | ... | post production supervisor (as Susan Martin) |
| Eliza Mitnick | ... | assistant editor |
| Brian Redondo | ... | editor |
| Avery Stray | ... | post-production manager |
Additional Crew
| Emre Izat | ... | network executive producer |
| Samantha Mason | ... | VP: Production Legal |
