In a California memorabilia shop in 2010, collector Randy Guijarro bought a tintype that looked to be a familiar figure, Billy the Kid - playing croquet with his gang known as The Regulators. As the gravity of the discovery began to set in, Guijarro initiated a chain of events that would lead him on a painstaking journey to verify the photograph's authenticity.
| Actor | Role |
|---|---|
 Kevin CostnerNarrator (voice) | Narrator (voice) |
| JJor-el VaasborgBilly The Kid | Billy The Kid |