Trivia: Bernard Cribbins, who plays Wilfred Mott, once appeared in a much earlier Doctor Who-related story - he played Tom Campbell in the feature film Dalek Invasion Earth 2050 AD, with Peter Cushing as the movie's alternate, human Doctor.
Trivia: At the end of the episode, Astrid is set loose to travel through space and time. Astrid is an anagram of TARDIS, which does the same thing.
Chosen answer: No, no information is avalible for the identity of the entity.
Repo_Man