Mark Oliver Everett, singer of the band EELS, on his quest to get to know his late father, quantum physicist Hugh Everett III, who invented the Many Worlds theory.
| Actor | Role |
|---|---|
 Mark Oliver EverettSelf | Self |
 Annie MacNarrator (voice) | Narrator (voice) |
| MMax TegmarkSelf | Self |
| NNiels BohrSelf (archive footage) | Self (archive footage) |