YMMV / The Sarah Jane Adventures S 3 E 7 E 8 The Eternity Trap

• Complete Monster: Erasmus Darkening is a supposed alchemist, who is actually an interdimensional being obsessed with immortality. Subjecting dozens of men, women, and children to his experiments, Erasmus traps them in a terrible limbo between dimensions, unable to interact with their surroundings as they live a miserable existence. Feeding off his victims' life forces to prolong his own, Erasmus cruelly separates James Marchwood from his young children and uses their dimensional-flickering states to ensure that while they are always near each other, they can never find their family.