London's Natural History Museum is a cathedral of nature, housing over 70 million specimens, and visited by more than 4 million people every year.

In this episode we examine a skull to discover if prehistoric Britains were cannibals, then pull a killer shark from a pool of formaldehyde to find out how it helped swimmers win Olympic gold. We dare a curator to handle a famous gem said to kill all who touch it, then enter a once top-secret room where WWII spymasters created a bomb that came within a hair’s-breadth of killing Hitler. We view the remains of Barbary Lions to find out why they spent their lives in the Tower of London, then consider a perfectly preserved specimen of a Dodo, to discover whether the flightless bird’s extinction was really as inevitable as we have been led to believe.