Tom was invited back by the Royal Institution to explain the remaining 3 Million-dollar Millennium Problems: Yang-Mills and the Mass Gap Hypothesis, the Hodge Conjecture, and the Birch and Swinnerton-Dyer Conjecture.

Watch part 1 on the Riemann Hypothesis, P vs NP, Navier-Stokes Equations, and the Poincaré Conjecture here.