第 1 季 共 10 集
播出时间：2019年7月17日
第 1 集 And Then They Discovered Fire
播出时间：2019年7月17日
With their camp threatened by a murderous tiger, Jane sees a chance for gender equality, while Gary invents - underwear. Also, they discover fire.
第 2 集 And Then They Got Drunk
播出时间：2019年7月17日
For the first time in history, the camp has the morning off from hunting and gathering. The possibilities for human achievement are endless. So they discover alcohol and get hammered.
第 3 集 And Then They Lost Fire
播出时间：2019年7月17日
After a rainstorm soaks the campsite, Jane leads a group, including a woefully unprepared Gary, on a dangerous quest to find dry wood. This leaves Marsh with a captive audience, and a chance to share the greatest story ever told.
第 4 集 And Then They Defined the Relationship
播出时间：2019年7月24日
Gary sets out to define humanity's first relationship, while Minerva tries to arm everyone in the camp with spears.
第 5 集 And Then They Became Best Friends
播出时间：2019年7月31日
After an elk saves his life, Ugg experiments with being a vegetarian. No one cares. Especially Gary and Trog, who are busy defining their relationship.
第 6 集 And Then They Had Guests
播出时间：2019年8月7日
Jane and Gary host the world's first exclusive party. But when a mysterious stranger collapses in their cave, the camp must address what it means to belong.
第 7 集 And Then They Almost Died
播出时间：2019年8月14日
After falling into the comfort of their relationship, a near-death experience makes Jane and Gary wonder if comfort is a good thing. Trog, sees his reflection in the world's first mirror and is not pleased by his appearance.
第 8 集 And Then They Played a Game
播出时间：2019年8月21日
In an effort to find a low-key, relaxing activity, Gary invents the first sport. Which leads the camp to discover competition, anger, divisiveness, and of course, violence.
第 9 集 And Then They Discovered the Wheel
播出时间：2019年8月28日
Upset he's not rewarded for inventing the wheel, Trog sets out to profit from his discovery, accidentally inventing the modern economy. Gary and Jane become poor immediately.
第 10 集 And Then They Had a Funeral
播出时间：2019年9月4日
Gary contracts a fatal rash, forcing him to confront his mortality. As expected, he deals with it maturely, demanding everyone in camp celebrate his legacy at the world's first funeral.
