Nature

Donald C. Johanson

Self

George Page

Narrator (voice), Host

Liev Schreiber

Narrator (voice)

Jason O'Mara

Narrator (voice)

Ed Trucco

Narrator (voice)

Howard McGillin

Narrator (voice)

F. Murray Abraham

Narrator (voice)

Romulus Whitaker

Narrator (voice)

Linda Hunt

Narrator (voice)

Stockard Channing

Narrator (voice)

James Naughton

Narrator (voice)

Lynn Sherr

Narrator (voice)

Mark Hamill

Narrator (voice)

Will Patton

Narrator (voice)

Laura Dern

Narrator (voice)

John Ritter

Narrator (voice)

Patricia Clarkson

Narrator (voice)

Anthony LaPaglia

Narrator (voice)