Othniel Marsh and Edward Cope become bitter rivals while creating Paleontology and Penzias & Wilson discover the sound of The Big Bang.
| Name | Type | Role | |
|---|---|---|---|
| Derek Waters | Writer | ||
| Justin Long | Guest Star | ||
| Jenny Slate | Guest Star | ||
| Greg Kinnear | Guest Star | ||
| Tony Hale | Guest Star | ||
| Mark Proksch | Guest Star | ||
| Christopher Meloni | Guest Star | ||
| Stephen Merchant | Guest Star | ||
| Jason Ritter | Guest Star | ||
| Tess Lynch | Guest Star | ||
| Derek Waters | Director |