In his new documentary, Jon Snow: A Last Big Story, he is seen uncovering an environmental disaster in Zambia.
The film will have its premiere at Sheffield Documentary Festival next week and be shown on Channel 4 on 20 June.
Channel 4’s head of news Louisa Compton said: “Jon Snow is not just one of Channel 4’s most recognisable faces – he is part of our very fabric and is dearly loved by viewers around the UK.
“It is a profound privilege that we are able to document his last big investigation, in a sensitively made film that frames Jon’s current affairs nous alongside a new life lived with Alzheimer’s.
“We hope this film will go a long way to raise awareness of how to live whilst facing a life-changing diagnosis.”
During his Channel 4 career, Snow was a fixture in the studio as well as travelling around to report on stories including the fall of the Berlin Wall, the release of Nelson Mandela and Barack Obama’s inauguration.
He received Bafta’s Richard Dimbleby Award for the best factual contribution to television in 2005, and the Bafta Fellowship – the organisation’s highest accolade – in 2015.
His other honours include 10 Royal Television Society awards, including six for presenter of the year.
