The Third Doctor Adventures: Volume Seven

 was a full cast audio anthology released on 18 May 2021 by Big Finish Productions. It was the seventh release of The Third Doctor Adventures. It featured Tim Treloar as the Third Doctor, Daisy Ashford as Liz Shaw, Jon Culshaw as Brigadier Lethbridge-Stewart and Sadie Miller as Sarah Jane Smith.

Publisher's summary
Two brand new adventures for the Third Doctor, Liz Shaw and Sarah Jane Smith.

7.1 The Unzal Incursion by Mark Wright

Under the supervision of the Doctor, the Brigadier and Dr Liz Shaw, UNIT are getting ready to activate Hotspur: their new and advanced early warning network.

But something goes wrong, and UNIT are betrayed from within. Suddenly bases are falling across the globe, and only the Doctor and his friends are able to escape.

Not knowing how far the conspiracy goes, the Doctor, Liz and the Brigadier become fugitives... and they soon discover worrying connections to both the Fulcrum military training facility... and something beyond this Earth.

7.2 The Gulf by Tim Foley

The TARDIS lands on an ocean planet and the Doctor and Sarah find themselves on a former rig that’s been converted into an artistic retreat.

But art is far from the residents’ minds. A painter has disappeared, and the Doctor senses a dark psychic presence at play.

The waves are rising. And there’s something in the water.

Featured actors

 * Tim Treloar
 * Daisy Ashford
 * Sadie Miller
 * Jon Culshaw