EXCLUSIVE: Countdown star Rachel Riley shared her thoughts on leaving the Channel 4 show just days before it was announced ...

Countdown 's Rachel Riley will be temporarily replaced by YouTube math star, Dr Tom Crawford. It was announced that Riley, ...

Rachel Riley is set to be temporarily replaced on Countdown by mathematician Dr Tom Crawford, as she takes a brief hiatus ...

Dr Tom Crawford’s videos of teaching equations in his underwear have helped him attract more than 200,000 subscribers ...

Rachel Riley is set to take a brief hiatus from Countdown, with mathematician Dr Tom Crawford stepping in as her temporary ...

Mathematician Dr. Tom Crawford will fill in Rachel Riley's role on Countdown while she takes a break from the show.

Comedian Alan Carr and Countdown star Susie Dent will help find the UK’s secret geniuses in a new Channel 4 competition show.

Mathematician Dr Tom Crawford will stand in for Rachel Riley on Channel 4's Countdown while she takes a short break to work ...

EXCLUSIVE: Rachel Riley shared her thoughts on leaving Channel 4 show Countdown, days before it was announced she will be ...