Alaric Stephen has hosted 12 episodes.
Alaric is a maths teacher at a sixth form college in England. Over the last year he's been writing articles about maths and puzzles on his website which now has over 400 entries.
Alex Mayall has hosted 12 episodes.
Alex works for a venture capital firm in London. Previously he was the host of the /r/Futurology podcast and was the head of Oxford's student radio station. He loves geometry and believes the hexagon to be the best shape, objectively speaking.