• 
  Edgar Wright

  Scientist  (5 episodes, 2002-2005)
• 
  Nick Frost

  Hot Jon  (2 episodes, 2002-2005)
• 
  Kevin Eldon

  Tony Rudd
• 
  Simon Pegg
• 
  Cavan Clerkin

  Adam Sandwich (1 episode, 2005)
• 
  Paul Jerrico

  Computer Jones (2 episodes, 2005)
• 
  Olivia Colman

  Pam Bachelor (6 episodes, 2005)
• 
  Alex Lowe

  Lee Griffiths (1 episode, 2005)

• 
  Harry Enfield

  Tchaikvosky's Ghost (1 episode, 2005)
• 
  Matt King

  Telephone Engineer (1 episode, 2002)
• 
  Tim Kirkby

  Nigel Fenton (1 episode, 2005)
• 
  David Schneider

  Man Outside Toilet (1 episode, 2002)
• 
  Paul Birchard

  Scott Nolan (1 episode, 2005)
• 
  Belinda Stewart-Wilson

  Patricia (1 episode, 2005)
• 
  Benedict Wong

  Chess Player  (2 episodes, 2002-2005)

• 
  Marc Warren

  Man with too many EBEs (1 episode, 2002)
• 
  Napoleon Ryan

  Ashley Swain (1 episode, 2002)
• 
  Ryan Cartwright

  Sam McNamara (1 episode, 2005)
• 
  Sarah Alexander

  Scientist  (3 episodes, 2002-2005)
• 
  David Mitchell

  Pat Taylor (1 episode, 2005)
• 
  Richard Leaf
• 
  Matt Lucas

  Dr. Philip Lavender (2 episodes, 2005)
• 
  David Walliams

  Bournemouth  (2 episodes, 2002-2005)
• 
  Robert Popper

  Jack Morgan (8 episodes, 2002-2005)
• 
  Peter Serafinowicz

  Scientist  (13 episodes, 2002-2005)
• 
  Josie D'Arby

  Pealy Maghti
• 
  Nigel Lambert

   Narrator (9 episodes, 2002)
• 
  James Serafinowicz

   Student with Copybook (9 episodes, 2002-2005)