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Dr Tom Crawford
From Countdown
{Arithmetician|image=OIP.jpg|200px|debut_episode=Episode 8459|debut_date=24 February 2025|latest_episode=Episode 8473|latest_date=14 March 2025}} Dr Tom Crawford is an arithmetician on Countdown. He debuted in Episode 8459 as part of a three-week stint where he stood in for Rachel Riley while she worked on another project, from 24 February 2025 until 14 March 2025.