TV tonight: oceanic wonder with David Attenborough in Blue Planet III

Take the plunge with shrimps, starfish and tawny nurse sharks. Plus, a mysterious, gambling-themed “quiz event” with Bradley Walsh. Here’s what to watch this evening

Blue Planet III

8pm, BBC One Life is every bit as strange and beautiful at the bottom of the ocean as it is on land – and it is even more profuse. In his 101st year, David Attenborough is still finding amazing things to show us. The quality of footage the BBC Natural History Unit now records is truly startling. The return of this beloved series begins in tropical seas where constant sunlight stimulates an extraordinary range of life.