Sarah Jane cannot resist going back in time to meet the parents she never knew - with disastrous consequences.

Sarah Jane has to make a devastating sacrifice in order to save Earth from the Trickster.

Now hunted by the Bane, Mrs Wormwood needs Sarah Jane's help to foil their plan to take over the galaxy with an ancient alien power. And Sarah Jane also needs help - from Sir Alistair Lethbridge-Stewart.