Mysteries of Evolution (2015)
S2E11 The Enemy of the Bane (1)
Episode Overview
Mrs. Wormwood comes back to seek Sarah Jane's assistance, revealing that the Bane have turned on her and are gearing up to unleash a sinister force upon the universe. To stop their nefarious scheme, Sarah Jane realizes she needs to enlist the help of a familiar ally from her past.
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S2