Cycle of Destruction (audio story)

 was the first story in the audio anthology Dalek Universe 2, produced by Big Finish Productions. It was written by Roy Gill and featured David Tennant as the Tenth Doctor, Jane Slavin as Anya Kingdom and Joe Sims as Mark Seven.

Publisher's summary
After Mark starts behaving oddly, the Doctor and Anya find themselves on a strange planet with their friend missing. Searching for him they find their way to an isolated research base. The corridors show signs of animal incursions and the scientists are behaving strangely. But a big surprise is waiting for them.

Because this is where Mark Seven came from. They’re about to find out who he is. But is that information too dangerous to know?

Plot
to be added

Cast
to be added
 * The Doctor - David Tennant
 * Anya Kingdom - Jane Slavin
 * Mark Seven - Joe Sims
 * Crispin Torr / Jason Four - John Banks
 * Mariah Six - Nina Toussaint-White

Continuity
to be added