The Truth Is in the Stars

William Shatner

as

Self

Neil deGrasse ...

as

Self

Chris Hadfield

as

Self

Whoopi Goldberg

as

Self

Stephen Hawking

as

Self

Jason Alexander

as

Self

Seth MacFarlane

as

Self

David Suzuki

as

Self

Ben Stiller

as

Self

Michio Kaku

as

Self