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Gary sets out to define humanity's first romantic relationship, while Minerva tries to arm everyone in camp with spears.
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.
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.