Bob the Builder

Fess Up or Mess Up (21x3)

Air date: Jan 04, 2018

After Leo builds a little robotic vehicle to enter in a robo-racing competition, Muck secretly takes 'Whizzer' with him on a build, despite being told not to. When Whizzer goes haywire because it still contains bugs, Muck does his best to solve the problem by himself.