When a newspaper reporter goes missing, the Doctor, Tegan and Nyssa uncover a case of alien abduction. The trail leads them to the planet Luparis, and a city that appears to be a replica of Tudor London.

What are the monsters that lurk in the shadows? And what is the terrible secret at the heart of Luparis? To save a world, the Doctor must try to defeat the evil plans of Queen Zafira.

And one of her plans is to marry him…

Based on a unused TV series script by Peter Ling and Hazel Adair, Doctor Who - The Lost Stories: Hexagora has been adapted for audio by Paul Finch and stars Peter Davison, Janet Fielding, Sarah Sutton, Jacqueline Pearce, Toby Hadoke, Richard Mark, Dan Starkey and Sean Brosnan.

You can download the story for just £2.99 until Thursday March 31st 2016 and discuss it with other listeners on Big Finish's Facebook page.

The Doctor, Nyssa and Tegan's adventures have continued this year in an all new Doctor Who Main Range trilogy. Doctor Who: The Waters of Amsterdam and Doctor Who: Aquitaine are available now. The trilogy concludes this month with the release of Doctor Who: The Peterloo Massacre. Check out the trailer below:

You can order these titles seperately or subscribe to the range today at an additional saving. And remember, when you choose to buy this release on CD directly from Big Finish, you will also unlock instant access to a digital copy for download.

You can also here more from this story's guest star Jacqueline Pearce in Call Me Jacks: Jacqueline Pearce in Conversation, the latest in our range of interview CDs. Over a bottle of champagne, Jacqueline enjoys an uncompromising conversation with Big Finish Executive Producer Nicholas Briggs, discussing her past triumphs and times. You can pre-order this CD today - with all copies of the CD version purchased before the release later this month signed by Jacqueline.

Please note that Call Me Jacks: Jacqueline Pearce in Conversation contains very strong language and material which may be unsuitable for younger listeners.

You can also enjoy a series of interviews from another of this story's guests with Toby Hadoke's Who's Round – a collection of free charity podcasts featuring Toby and guests from throughout Doctor Who's history. Click here for more details.

Explore further missing adventures from the classic series of Doctor Who on our Lost Stories range page.