Casting de The Principle
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Kate MulgrewNarrator
Michio KakuHimself
Lawrence KraussHimself
Charissa SaverioHologram- Julian BarbourHimself
- Robert J. BennettHimself
- John BylHimself
- Bernard J. CarrHimself
- George F.R. EllisHimself
- John HartnettHimself
- Ron HatchHimself
- Martin SelbredeHimself
- Robert SungenisHimself
- Max TegmarkHimself