• 
  Dara O'Briain

   Himself - Presenter (24 episodes, 2012-2014)
• 
  Marcus du Sautoy

   Himself - Mathematician (24 episodes, 2012-2014)
• 
  Graham Benham

  Self - Maths Student
• 
  Innes Lee

  Self - Maths Student
• 
  Marcus Brigstocke

  Self - Special Guest
• 
  Susan Calman

  Self - Special Guest
• 
  David O'Doherty

  Self - Special Guest
• 
  Andrew Maxwell

  Self - Special Guest

• 
  Andi Osho

  Self - Special Guest
• 
  Miles Jupp

  Self - Special Guest
• 
  Kevin Bridges

  Self - Special Guest
• 
  Sally Phillips

  Self - Special Guest
• 
  Peter Serafinowicz

  Self - Special Guest
• 
  Thomas Crawford

  Self - Maths Student
• 
  Adam Townsend

  Self - Maths Student

• 
  Mark Watson

  Self - Special Guest
• 
  Josh Widdicombe

  Self - Special Guest
• 
  Alex Horne

  Self - Special Guest