Peter Sallis

Wallace

Ashley Jensen

Self - Narrator

John Sparkes

Goronwy

William Kamkwamba

Self - Inventor

Peter Fisher

Self - Arthur Pedrick's Neighbour

Theo Jansen

Self - Kinetic Sculptor

Adam Hart

Self - Bee Scientist

Jem Stansfield

Self - Science Correspondent

Tim Gale

Self - Medical Engineering Expert

Chris Melhuish

Self - Bristol Robotics

George the Robot

Itself

Maggie Aderin-Pocock

Self - Optics Expert

Clive Sinclair

Self - Inventor

Anne Fisher

Self - Arthur Pedrick's Neighbour

Rainer Mugrauer

Self - Engineer Festo

Alan Bodner

Self - Inventor

Robert Hulse

Self - Brunel Expert

Craig Lundberg

Self

Nick Park

Writer