• Season 1, Story 3
• 2 episodes (individual titles and UK airdates given below)
  1. The Edge of Destruction (25:01) - Saturday 8 February 1964
  2. The Brink of Disaster (22:06) - Saturday 15 February 1964
• Author - David Whitaker
• Producer - Verity Lambert
• Directors - Richard Martin (Episode 1) & Frank Cox (Episode 2)

  MAIN CAST

• William Hartnell (The Doctor)
• Jacqueline Hill (Barbara Wright)
• William Russell (Ian Chesterton)
• Carole Ann Ford (Susan)

The picture quality is excellent most of the time. The Restoration Team have also used the VidFIRE process to restore the print to how it would have looked on original broadcast.
The sound quality is excellent.
95% for its sound and picture quality.

• Doctor Who: Origins (53:51)
  A featurette about the creation of Doctor Who - includes interviews with Verity Lambert, Waris Hussein, Richard Martin, William Russell, Carole Ann Ford, Brian Hodgson, and Bernard Lodge. Includes footage of an interview with series creator, Sydney Newman.
• Over the Edge (29:22)
  A featurette about the The Edge of Destruction - includes interviews with Verity Lambert, Waris Hussein, Richard Martin, William Russell, Carole Ann Ford, Frank Cox and Ray Cusick.
• Inside the Spaceship (10:14)
  A featurette about the TARDIS - the design and inception of the Doctor's ship.
• Masters of Sound (12:21)
  A featurette about finding the music and the sounds for Doctor Who - includes archive footage of interviews with Delia Derbyshire.
• Marco Polo (31:25)
  An abridged recreation of the fourth adventure, using stills and segments of the soundtrack of the story.
• Gallery (5:08)
  A selection of stills showing scenes and props fromThe Edge of Destruction and Marco Polo plus behind the scenes images. There are also a few stills of Behind the Scenes of the DVD Commentary
• Audio Option
  The choice to listen to an Arabic version of Episode 2 The Brink of Disaster
• PDF documents
  Accessible from computers, these documents are Radio Times billings plus the script for An Unearthly Child
• Information Text
  This enables the viewer to turn on/off information text which is displayed during video playback of the story.

His finger poised over a button, the Doctor ponders on the possibility that this might be the means by which he can rid himself of his two stowaways - Ian and Barbara. The Doctor presses the button: all four travellers are flung to the floor and the control room plunges into darkness.

One by one the travellers recover, but their memories are impaired. Unsure of who they are or how they come to be where they are, each tries to solve the mystery of recent events. As their memories return they begin to wonder about the nature of the threat that they are aware if approaching. Is it some force from outside the ship? Or is it something already inside...perhaps even one of the four travellers?