1 November 2014
Samuel Anderson (Danny Pink), Michelle Gomez (Missy), Sheila Reid (Gran), Joan Blackham (Woman), Chris Addison (Seb), Andrew Leung (Doctor Chang), Bradley Ford (Fleming), Antonio Bourouphael (Boy), Jeremiah Krage (cyberman), Ryan Armstrong (Cyberman Uncredited), Mr Armitage (Nigel Betts)
|Written by||Steven Moffat|
|Directed by||Rachel Talalay|
|Produced by||Peter Bennett|
One morning in every city and town in the world, the human race wakes up to face the most surprising invasion yet. Everywhere, in every land, a forest has grown overnight and taken back the Earth. It doesn’t take the Doctor long to discover that the final days of humanity have arrived.
- This episode marks the first on screen instance of a Time Lord changing gender through regeneration, although the possibility had been alluded to in The End of Time, The Doctor’s Wife and The Night of the Doctor.
- TARDIS keys can only be destroyed by being thrown in lava. The Doctor had previously told Clara this at some unseen point.
- Clara tries to use a mood patch to put the Doctor to sleep. (Gridlock)
- In Clara’s flat, there are numerous sticky notes with references to many events of her life and alternate lives. (Asylum of the Daleks, The Snowmen)
- This isn’t the first time that the Cybermen have hibernated in tombs. (The Tomb of the Cybermen, Nightmare in Silver)
- A female incarnation of the Master was previously mentioned to be among his various incarnations who were captured by the Sild. (Harvest of Time)
- The Doctor uses the TARDIS‘s telepathic interface, using Clara to find Danny. (Listen)
- Clara attempts to force the Doctor to go back in time and avert Danny‘s death. This isn’t the first time he has been asked to do so. (Earthshock, Father’s Day)
- The Master previously had an assistant named Chang Lee that he also killed, although in that case the effect was temporary. (TV Movie)
- The Cybermen walking from St Paul’s Cathedral and through the London streets emulates a famous scene in the 1968-1969 story The Invasion.