50, 000 years ago a pioneering pair of Cavemen, Rocky and Sticks, ponder life and the universe in a time of first discoveries. They consider the importance of a correct head landing, debate the merits of seeding the tree of life and question whether they truly are alone in the vastness of space and time.

Rocky and Sticks argue the ethics of sex after clubbing. It's a thing, but does that make it right? Spotting his perfect mate, spellbound Rocky needs Sticks to be his go-between. However, his Paleolithic pin-up rejects Rocky and gives Sticks no choice but to submit to an encounter that changes the game forever.

The Cavemen engage in the first religious war when Sticks' fire-God takes on Rocky's goat-God. Fire wins the battle but Goat the war, and Sticks concedes over the first Sunday roast. They are left without a divine presence on earth until God returns in the most humble of forms. Adrian and Dom present an investment bank with a failsafe SWOT analysis for the launch of '______'.

Rocky challenges Sticks to the ultimate staring competition. Not satisfied with the victory Rocky sets his sights on the record whatever the cost. Sticks introduces Rocky to a challenge of his own devising, but finds out in the most painful way that Rocky doesn't understand proportionate response.

Rocky and Sticks discuss the age-old question - if it's wrong to eat babies, why do they look scrumptious and meal-sized? As the pros and cons of baby-eating play themselves out, it becomes clear to Sticks that he and Rocky are on very different moral planes. Adrian is working day and night on his designs and surviving solely on coffee and cigarettes.

Sticks introduces Rocky to the best thing ever, spinning. The pair initially dabbles recreationally but when Rocky starts to spin on his own Sticks is troubled. He pleads with Rocky to rethink his life choice but instead he more aggressively chas- es the dizzy. Will Rocky literally spiral out of control?