The Sarah Jane Adventures, "The Eternity Trap" synposes

The BBC Press Office has released the synopses for both parts of The Eternity Trap, the 7th and 8th episodes in Series 3 of THE SARAH JANE ADVENTURES. The first installment airs on November 5th:

A haunted house, with mysterious whispers and secrets in the shadows attracts Sarah Jane's attention in the first of a new, two-part adventure, written by Phil Ford and directed by Alice Troughton.

When Professor Rivers and the gang investigate an old legend, a monstrous creature appears in the night as the terrifying grasp of Erasmus Darkening reaches out from centuries past.

The second part airs the next day:

Sarah Jane and the gang discover the secrets of Erasmus Darkening, in the second and concluding part of The Eternity Trap, but are they too late? As ghosts from the past rise up, and the quest to find the missing children reaches a climax, it seems that nothing can stop the ancient alchemist's rise to victory.

Sarah Jane Smith is played by Elisabeth Sladen, Professor Rivers by Floella Benjamin and Erasmus Darkening by Donald Sumpter. The Sarah Jane Adventures also stars Daniel Anthony as Clyde Langer, Anjili Mohindra as Rani Chandra, Callum Blue as Lord Marchwood, Adam Gillen as Toby Silverman, Amelia Clarkson as Elizabeth Marchwood, Rhys Gear as Joseph Marchwood and Tony Boncza as Mr Scriven.