Mathematician Dr Tom Crawford will stand in for Rachel Riley on Channel 4's Countdown while she takes a short break to work on another project, it has been announced.
Dr Crawford is well-known for his Tom Rocks Maths YouTube account, where he has more than 200,000 subscribers, with some of his videos clocking up millions of views.
His YouTube videos see him make "elite mathematics teaching available to everyone" and also feature the Equations Stripped series.
In the Equations Stripped videos, he simplifies and strips back maths equations "layer by layer so that everyone can understand" them - and also removes most of his clothes.
Dr Crawford is a mathematician at Cambridge and Oxford Universities, having completed his PhD in Applied Maths at Cambridge in 2016.
He also holds the position of Fellow by Special Election at St Edmund Hall and Public Engagement Lead at the Oxford University Department for Continuing Education.
He is a lecturer in Applied Mathematics at Cambridge's Robinson College and according to his official website, has 15 maths-themed tattoos.
Prepare for the most ridiculous announcement coming tomorrow... any guesses as to which TV show I'll be on? pic.twitter.com/0Ai9K2tqJE
— Dr Tom Crawford (@tomrocksmaths) February 19, 2025
Dr Crawford, who is a friend of Rachel Riley's and has spent time with her to learn the ropes, began filming in December.
He will be seen on screen alongside the show's lexicographer, Susie Dent, and host, Colin Murray, for the next three weeks.
Stephen Fry will be in Dictionary Corner for Dr Crawford's first show, with TV and radio presenter Jenny Powell and radio presenter Vick Hope also appearing as guests over the next three weeks.
Oxford University graduate Riley, who has been on the show since January 2009, said: "Countdown viewers are in great hands with Tom, who is a brilliant mathematician and a lovely guy.
"He's also used to people commenting on the clothes he wears (or lack of them) on his show so I am sure he will take to the role like a duck to water."
Dr Crawford said: "All of my work online is about sharing my love of Maths with the world whilst trying to make it accessible for everyone.
"Countdown has been doing that for a generation, so it really is a dream come true to be joining this iconic show to cover Rachel. I may even have to get another tattoo to commemorate the event."
Countdown was the first programme aired on Channel 4 when the broadcaster launched in November 1982. It airs on Channel 4 every weekday afternoon from 2:10pm.
Source: Press Association
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