The Eternity Trap: Part Two (Ep 8/12)
Here is the official Release for this episode
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 and Erasmus Darkening by Donald Sumpter.
UK Airdate: November 6, 2009