The Juggernauts (audio story)

 was the sixty-fifth monthly Doctor Who audio story produced by Big Finish Productions. Featuring Colin Baker's Sixth Doctor and Bonnie Langford as Melanie Bush this was the first appearance of the Mechanoids in an audio story. This was Bonnie Langford's second audio story with Colin Baker, the first was BFA: The One Doctor.

Publisher's summary
In a small mining colony on the dark and distant planet of Lethe, strange events are occurring -- the results of which could dramatically affect things on a universal scale. For within the dingy corridors of the artificial biosphere, the lone survivor of a devastating crash has expertly wormed his way into the lives of the colony's personnel.

A scientist known as Davros.

Separated from one another across space and time, the Doctor and Mel find themselves in very different predicaments: Mel has been employed on Lethe, while the Doctor has been imprisoned aboard an alien spacecraft. Both situations are inexorably linked, however, and at the apex of the two sits Davros and the terrifying possibility of a new threat even more powerful than the Daleks!

Rescuing Mel and stopping Davros should be the Doctor's primary goals, but could it be that this time, Mel does not wish to be rescued? And might Davros actually be working on something for the benefit of the civilised galaxies...?

Plot
to be added

Cast

 * The Doctor - Colin Baker
 * Melanie Bush - Bonnie Langford
 * Davros - Terry Molloy
 * Sonali - Bindya Solanki
 * Geoff - Klaus White
 * Kryson - Peter Forbes
 * Brauer - Paul Grunert
 * Loewen - Julia Houghton
 * The Daleks / The Mechanoids - Nicholas Briggs

Daleks

 * A Black Dalek is in charge of the Daleks who inform the Doctor of Davros' presence.

Individuals

 * The Doctor and Mel were trapped on a medical frigate when it was attacked by an mysterious enemy (which would later be revealed as the Daleks)
 * Mel was sent via an escape pod to the nearest habitable planet, Lethe.
 * Due to her programming skills, she became employed by the Outreach association, which was working on the upgrading of a number of ancient service robots under a scientist named Professor Vaso.

Planets

 * The atmosphere on Lethe was presumed to be poisonous to the Daleks.

Continuity

 * The Mechanoids were considered ancient when unearthed on the mining colony, Lethe. (DW: The Chase)
 * The ship transporting Davros and the surviving Daleks, belonging to both the Imperial and Renegade factions, from Tranquil Repose crashed on Lethe during their return voyage to Skaro. (DW: Revelation of the Daleks)