The Fourth Dimension
Back To The Future
Fear Her was written by Matthew Graham, co-creator of Life On Mars, Ashes To Ashes and Bonekickers. Graham claims that lead character Sam Tyler in Life On Mars was accidentally named after Rose Tyler when his daughter suggested using the surname without Graham realising why she had picked it.
Monsters Of Rock
Prior to the graphite scribble monster, the Doctor encountered other mineral-based lifeforms, such as the crystalline Krotons in The Krotons (1968), the Kastrians in 1976's The Hand Of Fear and the Ogri in 1978's The Stones Of Blood.
Nina Sosanya starred alongside David Tennant in the 2005 BBC production of Casanova, produced by Russell T Davies.
Not Frying Tonight
The episode wasn't originally intended to be filmed for Series Two, but found a slot when a planned episode written by Stephen Fry was postponed.
Edna Doré is probably best known for playing Frank Butcher's mother Mo in EastEnders.
Working titles for the episode included Chloe Webber Destroys the Earth and You're a Bad Girl, Chloe Webber.
The Doctor Who website ran a competition for artwork to be used for its homepage during the week the episode was transmitted.
Huw Edwards joined a long list of BBC newsreaders to feature in the show, playing himself commentating on the Olympic Opening Ceremony.
Bird Song The Kookaburra Song, featured in the episode, was written by Marion Sinclair in 1932 for a contest being held by the Victorian Guides.