One Mile Down (audio story)

 was the second story in The Tenth Doctor Adventures: Volume Three, produced by Big Finish Productions. It was written by Jenny T Colgan and featured David Tennant as the Tenth Doctor and Catherine Tate as Donna Noble.

Publisher's summary
Donna and the Doctor take a holiday - in the beautiful underwater city of Vallarasee.

Things have changed since the Doctor last swam through it: Vallarasee is now enclosed inside an airdome. Judoon patrol historic sites, and instead of tourists wearing helmets to breathe, the native Fins are forced to adapt.

But leaks have begun to trickle into the dome, and the Doctor and Donna must convince the Judoon that disaster is imminent. Or else thousands will be trapped, as the waters rise...

Plot
to be added

Cast

 * The Doctor - David Tennant
 * Donna Noble - Catherine Tate
 * Andrea - Rakie Ayola
 * Judoon Captain / Clo / Judoon - Nicholas Briggs
 * Patricia Derbyshire - Eleanor Crooks
 * Pickus - Christopher Naylor
 * Garth / Thispus - Robert Whitelock

Continuity

 * Later in her timeline, Donna would encounter the Judoon again whilst investigating missing planets (TV: The Stolen Earth).