An unrecognizable Blinky experiences the highs and lows of being a human; Angor Rot marks Jim for a fate that is worse than death.

In the second show of a two-part special, Jeremy Clarkson, Richard Hammond and James May are battling across Namibia in a quest to prove that beach buggies are brilliant.
Having survived the challenges of the desert, the trio must now brace themselves for even greater hardship involving rough roads, camping, rhino conservation and a rather unusual river crossing.

As the heroes look for the second Triumbric Stone, they wind up in unfamiliar marshlands; Claire wants Jim to be her dance partner.

Deep underground, below Valkyrien Square in Oslo, doomsday prepper Leif has arranged a place for doctor Ravn Eikanger to carry out research into his wife Vilma's terminal illness in secret. Above the surface Ravn keeps up the pretense of mourning his wife while below it, a severely injured robber Teo seeks refuge with Leif. Without medical attention, Teo will die and Ravn owes Leif a favor.

One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly-trivial detail. Why is someone destroying images of the late Prime Minister Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work? Something with its roots deep in Mary Watson's past.

Ravn is clutching at straws, searching for something that can help Vilma. Against Leif's will, Ravn decides to let Vilma's research colleague Unn in on the secret. Teo, trapped underground and separated from his pregnant wife Marit, dreams of building a shelter for himself and his family and Leif is keen to help. This, however, requires resources, so Leif begins to make demands of his tenants.

Cathy has a new, French boyfriend. He doesn't make the best first impression, which might be an issue if he is to survive meeting Mrs Brown.