Shield of the Jötunn (audio story)

 was the two hundred and sixth story in Big Finish's monthly range. It was written by Ian Edginton and featured Colin Baker as the Sixth Doctor and Miranda Raison as Constance Clarke.

Publisher's summary
2029 AD. In the desert of Arizona, billionaire philanthropist Dr Hugo Macht is trying to save the world from climate change. But his great project to "scrub the sky clean" with nanoatomic machines grinds to an unexpected halt when his diggers break into something unexpected: a Viking burial barrow containing eight corpses, a mysterious shield, an even more mysterious inscription... and a yet more mysterious traveller in time and space, known only as the Doctor.

And that's not even the strangest part of Dr Macht's day. Soon, it'll begin to snow. Soon, the Doctor and his Girl Friday, Mrs Constance Clarke, will come face-to-face with an ancient horror in the blizzard. A Frost Giant, in need of a new body. In need of flesh...

Part one
to be added

Part two
to be added

Part three
to be added

Part four
to be added

Cast

 * The Doctor - Colin Baker
 * Constance Clarke - Miranda Raison
 * Dr Hugo Macht - Michael J. Shannon
 * Professor Lisa Zetterling - Nell Mooney
 * Major Vincent Da Costa/Herger - James Caroll Jordan
 * Bryce/Talessh - Ryan Forde

Uncredited

 * The Völva - Louise Jameson

Continuity

 * The Doctor and Constance run into the parrot in the TARDIS. (AUDIO: The Sands of Life)
 * Constance refers to her work at Bletchley Park. (AUDIO: Criss-Cross)
 * Constance learns about the TARDIS' translation circuit. (TV: The End of the World et al.)
 * The Doctor tells Constance that humanity will exist until the end of the universe. (TV: Utopia)
 * Constance refers to her time in Nyasaland. (AUDIO: Criss-Cross)
 * Constance learns the meaning of the "TARDIS" acronym. (TV: An Unearthly Child et al.)
 * The Seventh Doctor later described artron energy as a form of mental energy. (PROSE: Timewyrm: Apocalypse)