Tardis

Spoilers are precisely defined here. Rules vary by the story's medium. Info from television stories can't be added here until after the top or bottom of the hour, British time, closest to the end credits roll on BBC One. Therefore, fans in the Americas who are sensitive to spoilers should avoid Tardis on Sundays until they've seen the episode.

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Tardis
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Tardis

Callum was originally a mouse who was turned into a little boy by the Master, who was trying to find a new body for himself. When the Seventh Doctor stopped the Master from using the time winds, Callum regressed back into a mouse. (PROSE: Omegamorphosis)

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