Alien File: Erasmus Darkening (webcast)

Alien File: Erasmus Darkening was shown as part of Sarah Jane's Alien Files on the CBBC website.

Plot
Clyde Langer and Rani Chandra sit in Sarah Jane Smith's attic and read. Clyde thinks history is amazing because there are some interesting characters such as Erasmus Darkening. He asks Mr Smith about Erasmus Darkening. Mr Smith tells Clyde and Rani a lot about Erasmus, James Marchwood and Erasmus's transdimensional accelerator.

Cast

 * Clyde Langer - Daniel Anthony
 * Rani Chandra - Anjli Mohindra
 * Mr Smith - Alexander Armstrong

Worldbuilding

 * In the 1920s the psychic investigator Harry Price catalogued 121 different entities within Ashen Hill Manor.
 * Erasmus Darkening has a transdimensional accelerator.

Story notes

 * This episode features clips from The Eternity Trap.