A documentary re-telling of the remarkable and dangerous journey taken by President Theodore Roosevelt and legendary Brazilian explorer Cândido Rondon into the heart of the South American rainforest to chart an unexplored tributary of the Amazon.
| Actor | Role |
|---|---|
 Alec BaldwinTheodore Roosevelt (voice) | Theodore Roosevelt (voice) |
 Wagner MouraCândido Rondon (voice) | Cândido Rondon (voice) |
 Jake LacyKermit Roosevelt (voice) | Kermit Roosevelt (voice) |
| BBill CoeliusGeorge Cherrie (voice) | George Cherrie (voice) |
 Oliver PlattSelf - Narrator (voice) | Self - Narrator (voice) |