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1第 1 集
With their camp threatened by a murderous tiger, Jane sees a chance for gender equality, while Gary invents - underwear. Also, they discover fire.
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2第 2 集
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.
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3第 3 集
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.
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4第 4 集
Gary sets out to define humanity's first relationship, while Minerva tries to arm everyone in the camp with spears.
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5第 5 集
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.
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6第 6 集
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.
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7第 7 集
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.
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8第 8 集
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.
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9第 9 集
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.
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10第 10 集
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.