The New Horizons spacecraft attempts to fly by a mysterious object known as Arrokoth, believed to be a primordial building block of the solar system. Three years after taking the first spectacular photos of Pluto, New Horizons is four billion miles from Earth, trying to achieve the most distant flyby in NASA’s history. If successful, it will shed light on one of the least understood regions of our solar system: the Kuiper Belt.
| Actor | Role |
|---|---|
| CCraig SechlerSelf - Narrator | Self - Narrator |
| JJoel ParkerHimself | Himself |
| MMarc BuieHimself | Himself |
 Michael E. BrownHimself | Himself |
| DDavid JewittHimself | Himself |
| CCathy OlkinHerself | Herself |
| AAnne VerbiscerHerself | Herself |
 Konstantin BatyginHimself | Himself |
| CCarey LisseHimself | Himself |
| AAlice BowmanHerself | Herself |
| AAlan SternHimself | Himself |
| MMark ShowalterHimself | Himself |
| HHal WeaverHimself | Himself |
| GGlen FountainHimself | Himself |
| JJohn SpencerHimself | Himself |
| CCaleb ScharfHimself | Himself |
 Derrick PittsHimself | Himself |
| MMark HoldridgeHimself | Himself |
| HHilke SchlichtingHerself | Herself |
| FFred PelletierHimself | Himself |