Digested week: ‘Just when you thought it was safe to go back in the water … ’ but this time, it’s real | Emma Brockes

Three-part docudrama makes notion of going into the sea in the UK terrifying - much as Jaws did for Americans in 1975

Since I was a child I've been going to the same beach on the south coast and never given a second thought to its safety. Swimming in the US, you have the occasional panic about sharks. In South Africa I got stung by a jellyfish. But the English seaside, give or take the odd riptide and the constant threat of hypothermia, has always seemed benign in its outlook, a dull, unthreatening sea.