Vortex Ice (audio story)

 was a full cast audio story released on 16 May 2017 by Big Finish Productions. Shorter than the vast majority of stories in the Doctor Who monthly range, it appeared alongside Cortex Fire.

Publisher's summary
In search of "exotic particles", the Doctor and Flip arrive 700 feet underground, in a mine in Northern Mexico – only to run into a scientific expedition. Among their number, an exobiologist. They're all on the hunt for alien life! Deep underground, the team finally uncovers a cave of vast crystals – like ice, despite the heat. And inside the crystal: something frozen. Something trapped in time. If only it were something simple, like a monster. But it's far, far worse than that.

Plot
to be added

Cast

 * The Doctor - Colin Baker
 * Flip - Lisa Greenwood
 * Sai Chopra - Shobu Kapoor
 * Dylan Argent - Orlando Seale
 * Jannik Woolf - Monty D’Inverno

Continuity

 * The Doctor refers to artron energy. (TV: Four to Doomsday)
 * The Doctor states that Gallifrey is "just to the left" of Karn. (TV: The Brain of Morbius)