For the cybernetic verison, see Hydroflax with Nardole Head.[edit]

Nardole met the Twelfth Doctor while working for River Song. He was behaded by Hydroflax, who wanted his knowledge of River's plans for the Halassi Androvar. Having defeated Hydroflax, the Doctor subsequently restored Nardole's head to a human body.

Read more about this topic on the Tardis Data Core.
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