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This time it's the lowdown on her nemesis the Trickster, and Krislok the time-travelling Graske.

This time Rani gives us the lowdown on the Entity, Eve and Ship.

Luke, back from university, has the lowdown on his creator Mrs Wormwood, and her fearsome Bane mother, as well as revealing information on the ultimate space warrior clones - the Sontarans.

Sarah Jane has the lowdown on slithery Slitheen, their untrustworthy Blathereen cousins and their deadly gift of Rakweed.

Clyde has the lowdown on the all-controlling Berserkers and the alien truth behind the world's most famous painting - the Mona Lisa.

Luke has the lowdown on space police the Judoon, alien secret protector Mister Dread, and the galaxy-destroying Androvax the Veil.