Doctor Who (2005– )
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The Zygon Invasion 

The fragile peace between the Humans and the Zygons is on a knife edge. Tensions run high as factions within the Zygon community seek to incite violent action against Humans. Called in by ... See full summary »


Daniel Nettheim


Peter Harness




Episode cast overview, first billed only:
Peter Capaldi ... The Doctor
Jenna Coleman ... Clara / Bonnie
Ingrid Oliver ... Osgood
Jemma Redgrave ... Kate
Jaye Griffiths ... Jac
Cleopatra Dickens ... Claudette
Sasha Dickens Sasha Dickens ... Jemima
Rebecca Front ... Walsh
Abhishek Singh Abhishek Singh ... Little Boy
Nora Livera ... Little Boy's mum (as Samila Kularatne)
Todd Kramer Todd Kramer ... Hitchley
Jill Winternitz ... Lisa (Drone Op)
Gretchen Egolf ... Norlander
Karen Mann Karen Mann ... Hitchley's Mom
James Bailey James Bailey ... Walsh's Son (credit only)


The fragile peace between the Humans and the Zygons is on a knife edge. Tensions run high as factions within the Zygon community seek to incite violent action against Humans. Called in by UNIT, the Doctor and Clara fight to bring the situation under control. But one question remains: Where on Earth is Osgood?

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Did You Know?


The shot near the end of Clara's clone troops marching down a tunnel seems to be a very nice reference to a similar scene during Run Like Hell in Pink Floyd: The Wall (1982). Both feature goose stepping troops, dressed in black, in formation, in a tunnel, back lit, and very low camera angels. See more »


The addresses of the witness and offender in the crime report which Kate examines are given as 72 Made Up Crescent and 10 Fictional Close. See more »


The Doctor: Which one are you? Human or Zygon?
Osgood: I don't answer that question
The Doctor: Why not?
Osgood: Because there is no question to answer. I don't accept it. My sister and I were the living embodiment of the peace we made. I will give all the lives that I have to protect it. You want to know who I am, Doctor? I am the peace. I am human and Zygon.
The Doctor: Like a hybrid.
See more »


Referenced in Doctor Who: Heaven Sent (2015) See more »


Amazing Grace
Performed by Peter Capaldi
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User Reviews

The Enemy Within
14 April 2019 | by A_Kind_Of_CineMagicSee all my reviews

This is the first part of a 2 part story and follows on from plotlines introduced in the 50th Anniversary special The Day of the Doctor in which Zygons were allowed to live on Earth disguised as humans. Here we find that a faction of the Zygons is rebelling, looking to attack, take control and return to Zygon form. We are shown that one of the Osgoods has survived and will not reveal whether she is the human or Zygon version. She has taken matters into her own hands to try to stop things reaching massive loss of life.

The Zygons are a great monster and are depicted well in this story and the threat presented is suitably menacing. UNITs involvement is well used and it is always great to have Jemma Redgrave appearing as Kate Lethbridge-Stewart and Ingrid Oliver as Osgood. Clara is used well in the story although I find it a little annoying when she takes command of situations and gives orders to supposedly experienced military personnel rather than just giving advice or suggestions. It is also a little annoying having the President of Earth and Air Force One used again as they are slightly silly ideas.

Peter Capaldi is on top form in this whole story and even sells the slightly silly bits of humour in a school playground or aboard his Presidential plane. His quality is unquestionable.

Writer Peter Harness wrote the stupid and very illogical Kill the Moon but has a complete turnaround in this story where the writing is extremely entertaining and high quality. The script is strong and the plot is interesting. There are clear political messages (a pretty common Doctor Who theme despite what some fans like to make out) and these messages are good moral aspects to explore. It is well executed and enjoyable.

There is humour, intrigue, action and danger with Capaldi's brilliant Doctor at the centre of it all so it is very good indeed with no significant negatives.


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Release Date:

31 October 2015 (USA) See more »

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