TV tonight: Jon Snow defies Alzheimer’s in the most moving way imaginable

A Last Big Story is a stirring exploration of the journalist’s condition and his news instincts. Plus, a wholesome telling of the story of Indigenous Australian tennis legend Evonne Goolagong. Here’s what to watch this evening 8pm, Channel 4This documentary starts out as a meditation on the Channel 4 newsreader’s Alzheimer’s diagnosis – but the journalist in him hasn’t departed quite yet. While Jon and his wife Precious are on holiday in Victoria Falls, he stumbles upon a mining disaster that has had almost no coverage in the media. His determination to get the tragedy into the news is stirring and very moving. Phil Harrison 7pm, Sky ArtsComprehensive coverage of the offshore festival begins with a thorough Rick-rolling from Mr Astley on the Main Stage. Later, there are sets from Anastacia, Five, Rita Ora, Feeder and Calvin Harris, all warming up for a headline turn from the Sex Pistols – now Rotten-free but featuring the vocals of Frank Carter. PH A big-hearted three-parter about Indigenous Australian champion tennis player Evonne Goolagong (Lila McGuire). As she makes her Wimbledon debut in 1970, her story flashes back to when she was a child (played by Eloise Hart)