All Cast

Neil deGrasse Tyson

Neil deGrasse Tyson

Self

Bill Nye

Bill Nye

Self

Michio Kaku

Michio Kaku

Self

Jim Lovell

Jim Lovell

Self

Gene Kranz

Gene Kranz

Self

Lawrence Krauss

Lawrence Krauss

Self

Robert Zubrin

Robert Zubrin

Self

Leroy Chiao

Leroy Chiao

Self

Story Musgrave

Story Musgrave

Self

Rick Tumlinson

Rick Tumlinson

Self

Marcia Smith

Marcia Smith

Self