YMMV / The Sarah Jane Adventures S1 E3-E4 "Eye of the Gorgon"

• Complete Monster: The Gorgon is a parasitic being with a habit of possessing bodies and discarding them when its host gets too old and feeble—an action that the Gorgon has pulled off for the past 3,000 years. Brainwashing a convent of nuns, the Gorgon has them hunt for the Gorgon's talisman to allow it to initiate an invasion in which its species would take a parasitic hold on the human race. The Gorgon also has a hobby of petrifying people, a fate that keeps its victims conscious for an hour before they expire, with it being shown that it has a courtyard full of victims—with it also petrifying a lackey for failure and Maria's dad, almost killing him. With its current body near the end of its life, the Gorgon has the convent hold Sarah down, with the intent on using her as its new host.

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