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Hedgehog in the Iron Mask

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"Hedgehog in the Iron Mask" is the twenty-third episode of the Sonic Underground television series. It first aired on 24 March 1999 in France and on 29 September 1999 in the United States. It was included in Volume 2.


The Hedgehogs' latest quest to find their mother takes them to the prison tower where they encounter a masked stranger who insists he is family. This stranger is actually being used as bait for another attempt by Robotnik to capture them. The stranger creates a rift between the siblings, which leaves the Underground disbanded, vulnerable and ultimately trapped. The Hedgehogs find a way to escape the prison walls that held their mother captive many years ago.


Title in other languages

Language Title Translation
French Mascarade Masquerade
German Der Igel mit der eisernen Maske The Hedgehog with the Iron Mask
Spanish El erizo en la máscara de hierro The Hedgehog in the Iron Mask


  • The title of this episode is a parody of the title of the film Man in the Iron Mask.
  • When the episode aired on The Hub on October 31, 2013, during the Share to Scare Program on October 31st.
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