The Age of Gigantism
- Episode aired May 31, 2009
- TV-G
- 52m
220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.220 million years ago, Dinosaurs and Mammals begin their 150 million year battle for dominance.
Craig Sechler
- Narrator US
- (voice)
Tesshô Genda
- Narrator Japan
- (voice)
Philippe Lebeau
- Self
- (voice)
François Montagut
- Self
- (voice)
Ken Carpenter
- Self - Denver Museum of Nature and Science
- (as Dr. Kenneth Carpenter)
Zhe-Xi Luo
- Self - Carnegie Museum of Natural History
- (as Dr. Zhe-Xi Luo)
Peter Ward
- Self - University of Washington
- (as Dr. Peter Ward)
Scott Hartman
- Self
- (uncredited)