Jerry Hoffman

饰：Charles Sternberg

Albert J. Burnes

Albert J. Burnes

饰：Male Grad Student (as Albert Burnes)

Casey Myers

Casey Myers

饰：Texas Collector 2 (as Casey Meyers)

Caroline Vinciguerra

饰：Mom

Paul Burmaster

Paul Burmaster

饰：North Dakota Collector #1

Toni Dodd

Toni Dodd

饰：Pamela Everhart

布莱恩·莱蒙斯

Brian Lemmons

饰：Worker - Phosphate Mine

Chris Koeberl

Chris Koeberl

饰：Netherlands Scientist

Jennifer Aguilar

饰：Female Grad Student

Michael Ashcroft

Michael Ashcroft

饰：South Dakota Scientist 2

Kathleen Leighton

Kathleen Leighton

饰：Texas Collector 1

Frank Novak

Frank Novak

饰：George Sternberg (60s)

唐·尼克尔斯

Dan Nichols

饰：Martin

Paul W. Burmaster

Paul W. Burmaster

饰：North Dakota Collector

C.J. Johnson

C.J. Johnson

饰：Road Worker

Chris Glaze

Chris Glaze

饰：Michael J. Everhart

Nissam Mina

Nissam Mina

饰：Forman - Phosphate Mine

Curtis Hawkins

Curtis Hawkins

饰：Worker - Phosphate Mine

Cheryl Hunter

Cheryl Hunter

饰：Dr. Betsy Richards

Derek Gamble

Derek Gamble

饰：Worker - Phosphate Mine

道格·基斯根

Doug Kisgen

饰：Levi Sternberg

Efi Kamara

Efi Kamara

饰：Worker - Phosphate Mine

Daniel Coldham

Daniel Coldham

饰：Worker - Phosphate Mine

Michael Ashcraft

Michael Ashcraft

饰：South Dakota Scientist 2

利亚姆·欧文

Liam Owen

饰：Photographer

Jeff Staab

Jeff Staab

饰：George Sternberg (as Jeff Staab)

Shari Phillips

Shari Phillips

饰：Camping Mother Voice

James Rudnick

James Rudnick

饰：Australian Scientist 1

Kevin Stidham

饰：Australian Scientist 2

Joe Salem

Joe Salem

饰：Camping Father

Walley Thornton

Walley Thornton

饰：Reporter

Charlotte Salem

Charlotte Salem

饰：Camping Daughter

Jack van Dijk

Jack van Dijk

饰：Netherlands Scientist

Chris Wheatley

Chris Wheatley

饰：North Dakota Collector

列维·施瑞博尔

Liev Schreiber

饰：Himself - Narrator

迈克尔·麦康诺希

Michael McConnohie

饰：George Sternberg

迈克尔·索里奇

Michael Sorich

饰：South Dakota Scientist 1

Thea Phillips

Thea Phillips

饰：Camping Daughter

列维·施瑞博尔

Liev Schreiber

饰：自己

迈克尔·麦康诺希

Michael McConnohie

饰：自己

迈克尔·索里奇

Michael Sorich

饰：自己

Chris Zegers

饰：Dutch Narrator,

Jeffrey Staab

饰：George F. Sternberg (30s)

Christopher Wheatley

Christopher Wheatley

饰：North Dakota Collector #2,(as Chris Wheatley)