Tonight Romesh is dangled above a pit of hungry crocodiles with only a humble household vacuum cleaner able to save his life. Ben travels to the city of love, Paris to meet a friendly AI robot, Rachel carry's out her own tests into how the ‘Placebo Effect' works with incredible results. And we also attempt to set a brand new world record using the power of a laser.

In the final episode of the series, Rachel Riley rides a bike like no other, this one is sixty foot in the air. Romesh discovers how science is muscling in on the dating scene. Elsewhere Ben travels to Germany to witness the flammable properties of Hydrogen.