Ernest Penfold is Danger Mouse's hamster assistant and best friend. Often mistaken for a mole (presumably on account of his spectacles), Penfold is actually a hamster.

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He is code-named the Jigsaw because, at the first sign of danger, he falls to pieces.

Trivia

  • He was voiced by Peter Hawkins in the pilot with a Welsh accent, also suggesting his role was offered to the latter before Terry Scott was cast for him.
  • Before Terry Scott was selected for his role, Scott played Leatherhead in both the pilot episode and final series.

Role in Count Duckula

  • He and Danger Mouse appears in the new Count Duckula series.