He deduces that he, Clyde and Rani are in the same reality and calls to them, telling them to imagine a red door and to walk through it.

Julian Bleach has previously appeared in the Torchwood episode "From Out of the Rain" as the Ghostmaker and Davros in the Doctor Who episodes "The Stolen Earth" and "Journey's End" (both of which also featured Elisabeth Sladen as Sarah Jane Smith) making him one of very few actors to appear in all three shows.

[citation needed] The BBC had originally approached Russell T. Davies and asked him to make a character gay in the show.

Davies planned for this character to be Luke, and intended to begin foreshadowing it from The Nightmare Man.

The line which is cut is from the scene in which Luke saying goodbye to Sarah Jane as he departs for university.