Paleontologists Othniel Marsh and Edward Cope become rivals, and Penzias & Wilson discover the echo of the Big Bang. Featuring Greg Kinnear, Stephen Merchant, Justin Long, Jason Ritter, Tony Hale and Christopher Meloni.

• Drunk History
• Jeremy Konner
• Bennie Arthur
• Tim Baltz
• Mort Burke
• Sarah Burns
• Maria Blasucci
• Craig Cackowski
• Michael Cassady
• Michael Coleman
• Tymberlee Hill
• Adam Nee