Reverse Engineering (audio story)

Reverse Engineering was the second story in the audio anthology Purity Undreamed produced by Big Finish Productions. It was written by Jonathan Morris and featured Colin Baker as the Sixth Doctor, Bonnie Langford as Melanie Bush, Ruth Madeley as Hebe Harrison and Imogen Stubbs as Patricia McBride.

Publisher's summary
When Patricia is invited to a secretive Swedish clinic by an old colleague, she tips off the Doctor, Mel and Hebe, who go undercover to investigate. Charismatic geneticist Killian Holm offers to restore youth to his wealthy patients, but the truth of his work is far more radical - and far more dangerous!

As an ancient horror reforms beneath the clinic, the Doctor must race to save humanity from an unspeakable temporal disaster.

Plot
to be added

Cast
to be added
 * The Doctor - Colin Baker
 * Melanie Bush - Bonnie Langford
 * Hebe Harrison - Ruth Madeley
 * Professor Patricia McBride - Imogen Stubbs
 * Killian Holm - Stephen Riddle

Continuity
to be added