PICK OF THE DAY

HUMPBACK WHALES: A DETECTIVE STORY, 9PM, BBC2

AFTER a potentially deadly encounter with a 30-ton humpback whale off the coast of California in 2015, wildlife film-maker Tom Mustill wanted to learn more about these amazing creatures. Tom talks to whale experts and finds out that we still have a great deal to learn about humpbacks, but all the evidence suggests that they are gentle, friendly and inquisitive. Tom’s detective work sets him on a fascinating journey that he hopes will lead him to the very individual he encountered, and also raises questions about how man and whale should share the seas.