Did his AI girlfriend convince him to become an assassin? (ft. Hannah Fry)

Originally broadcast on 23rd February 2026. This is the wildest AI story you've never heard of. In 2021, Jaswant Singh Chail broke into Windsor castle armed with a crossbow, and a single mission - to kill Queen Elizabeth II. But what most people don't realise is that behind it all, his AI chatbot girlfriend was fostering his delusions. This is the story of their relationship. Head to BBC iPlayer to watch the full episode, from the series AI Confidential with Hannah Fry: https://www.bbc.co.uk/iplayer/episode/m002q76d/ai-confidential-with-hannah-fry-series-1-1-the-boy-who-tried-to-kill-the-queen If you or anyone you know has been affected by this video, details of organisations offering information and support are available at BBC Action Line: https://www.bbc.co.uk/actionline/ Subscribe: youtube.com/@bbcdeepwatch?sub_confirmation=1 BBC deepwatch is powered by BBC Three: https://www.bbc.co.uk/tv/bbcthree For full accessibility, including accurate subtitles, you can watch the fully accessible version of this video on BBC iPlayer. #hannahfry #truecrimestory #airelationships