Jon Snow, 78, admits 'I thought I was dead' as he talks about his devastating Alzheimer's diagnosis: 'The creaking of what was left of the brain was outspinning the sound of my voice'

- For confidential advice, call Alzheimer's Society's Dementia Support Line on 0333 150 3456 - Alzheimer's Society's symptoms checker can help spot the signs of dementia - READ MORE: How to spot if someone you love has warning signs of dementia - See more Daily Mail on Google - save us as a Preferred Source Jon Snow admits he thought he was dead following his devastating Alzheimer's diagnosis. The presenter, 78, retired from Channel 4 news in 2021, after more than three decades. Just two years later, Jon was diagnosed with Alzheimer's. Alzheimer's is a progressive, irreversible brain disorder and the most common cause of dementia. It slowly destroys memory, thinking skills, and the ability to carry out the simplest daily tasks. Jon Snow: A Last Big Story, made in conjunction with the Alzheimer’s Society, is set to air on Channel 4 on Saturday, and the newsreader talks about his battle with the disorder. It is a big move for Jon, who initially wanted to hide having Alzheimer's as 'there’s so much prejudice'. He adds: 'Any sort of hint of mental decay, you're sort of dead. There are moments when it pops up but it's not an all day, every day condition, and that's what I cling onto.' Jon Snow admits he thought he was dead following his devastating Alzheimer's diagnosis The one-off documentary follows Jon and his former editor at Channel 4 News Ben de Pear exposing injustice, by fighting for a Zambian community whose land and water have been decimated by a mining disaster being covered up by officials. In one clip, Jon speaks about how much he has missed working after Ben tells him: 'You're always a morning person'. The newsreader replies: 'I didn’t think I was unduly early this morning. But in all honesty, I just love the action. I've missed it very much. And I thought I was dead.' Ben jokingly says he wrote Jon's obituary. Jon tells him: 'I hope you've missed me. I was deported before my time.' While Ben replies he 'served his sentence' after three decades at Channel 4, Jon says: 'Yes, I think the creaking of the brain of what was left of it was outspinning the sound of my voice.' After more than three decades on Channel 4 News, Jon reluctantly agreed to retire and broadcast his last bulletin in December 2021, at the age of 74. Jon Snow: A Last Big Story, made in conjunction with the Alzheimer’s Society, is set to air on Channel 4 on Saturday, and the newsreader talks about his battle with the disorder His deterioration began almost immediately. Without the stimulation of the newsroom, he sank into a deep depression and appeared to lose his appetite for life. Ten months after that last bulletin, he woke one morning and told his wife Precious Lunga, 51, he was late for work. When she gently reminded him that he had retired from Channel 4 News, he looked crushed. Initially, Jon was reluctant to see a doctor, insisting there was nothing wrong, even when everyone around him knew that wasn’t the case, and Precious was becoming ill with the strain of covering for him. Finally, in early 2023, Precious persuaded her husband to see a specialist. A brain scan revealed Jon has Alzheimer's. The film follows Jon and his wife, Dr Precious Lunga, as they come to terms with Jon’s Alzheimer's diagnosis. Precious, a neuroscientist, knows that the worst thing for Jon is to suffer behind closed doors and the couple are determined to live the fullest life possible with the years they have left together. Jon Snow: A Last Big Story will be available to watch and stream on Channel 4 at 8pm, Saturday, June 20. For dementia information and support, visit alzheimers.org.uk or phone the Dementia Support Line on 0333 150 3456