Only the BBC does great programmes like this.
Five numbers is a series of 15 minute programmes about numbers in mathematics. The first series covered zero, pi, the Golden Ratio, imaginary numbers and infinity.
A second series [Another five numbers] covers 4, 7, prime numbers, Kepler’s Conjecture and game theory.
A third series covers Benford's Law [essential listening if you are contemplating accounting fraud], doubling [Moore’s Law etc], degrees of separation [it applies to more than Kevin Bacon], G and taxicab numbers.
There is also -
Five Shapes - the cube, the pyramid, the sphere, the bagel [aka torus] and the blob.