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Serial: 5F  Episode Nos. 500, 501, 502, 503, 504, and 505.  Title: The Armageddon Factor

The sixth, final, and most important segment of the Key to Time is located on the planet Atrios, which is at nuclear war

with it's twin planet Zeos.  Somehow the segment is linked to the Princess Astra, and when she is abducted, the Doctor

and Romana start a search that leads them to the master general on the planet Zeos: a computer called Mentalis,

programmed to obliterate Atrios and to destroy everything before being destroyed.  Can the Doctor and Romana

complete the Key to Time before the agent of the Black Guardian destroys all?


This story is the last to feature Mary Tamm as Romana, and the first to feature Valentine Dyall as the Black Guardian.
It is the last story in the quest for the Key to Time.

starring Tom Baker as Doctor Who, Mary Tamm as Romana, Valentine Dyall as the Black Guardian, and

John Leeson as the Voice of K9.

Written by Bob Baker and Dave Martin, Produced by Graham Williams, and Directed by Michael Hayes.

Originally transmitted from 20 January 1979 to 24 February 1979 on BBC1.


DVD Features:


On Disc 1:

-         All six 25-minute episodes with full restoration treatment.

-         Graphical menus, episode and scene selection features, and subtitles for the hearing impaired.

-     Commentary 1 with actors Mary Tamm and John Woodvine (the Marshal) and director Michael Hayes.
-     Commentary 2 with actors Tom Baker, Mary Tamm, and John Leeson.

-         Production Notes subtitles.  Displays pop-up production trivia throughout the story.

-         PDF Files.  Two pdf files on the disc: one of the Radio Times TV listings for this story, and the 1979

Doctor Who Annual.  The files are readable by a computer. 


            On Disc 2:

-         “Defining Shadows" 16-minute making-of featurette, featuring interviews with writers Bob Baker and

Dave Martin, actors Lalla Ward (Princess Astra), Barry Jackson (Drax), Davyd Harries (Shapp),

designer Richard McManan-Smith, and director Michael Hayes.
-   Alternative/Extended Scene. 3 minutes from a black and white videotape of a scene that was truncated

a bit in the final edit in Part Three of the Doctor meeting up with Shapp on Zeos.
-   Directing Who. 8-minute featurette about Michael Hayes' three stories as the director (those were

The Androids of Tara, The Armageddon Factor, and City of Death), featuring an interview with Hayes


-   “Rogue Time Lords” 13-minute featurette about all the renegade Time Lords we've met down the years.
-   Pebble Mill at One. 8-minute interview with Tom Baker from 1979 tying in to the series hitting its 500th

episode as of Part One of this story.
-   Radiophonic Feature. 4-minute segment from Pebble Mill in 1979 that visited the BBC Radiophonic

Workshop.  Features interviews with Dick Mills and Brian Hodgson of the Workshop.
-   The New Sound of Music. 1-minute bit from the cutting room floor of that same BBC RW feature.
-   Merry Christmas, Doctor Who. Special 1-minute sketch recorded from the Armageddon Factor set where

K9 asks the Doctor what he most desires at Christmas... and then he has a look at Romana....
-   Continuities. 3 minutes.  (These are the BBC introductions and trailers for the episodes.)
-   Photo Gallery. 5 minutes.
-   Late Night Stories. Five children’s short story readings by Tom Baker for a short TV series.

Each is about 15 minutes. The titles are The Photograph, The Emissary, Nursery Tea, The End

of the Party, and Sredni Vashtar.
-   Easter Egg.  Highlight the blank area below to reveal the invisible text and find out what this is and where…

Highlight the “Continuities” selection on page 2 of the Special Features, then press the right arrow.

A Doctor Who logo will appear up in the top right corner.  Select this and you will see a reconstruction

of a technical fault that occurred during the original 1979 broadcast that interrupted the program for

a minute as the video playback machine jammed and they put up some music to cover the dead air.