Gallifrey: Enemy Lines continues the story of Big Finish's phenomenally popular Doctor Who spin-off. Three former companions of the Doctor find their current home-world under threat, when terrors from both the past and future threaten to lead the Time Lords to war. Now Romana (Lalla Ward), Leela (Louise Jameson) and Ace (Sophie Aldred) must call on centuries of experience to save reality and themselves! Listen to the trailer for this six story set below:

In the distant future, President Romanadvoratrelundar will do anything it takes to save her world, even if it means sacrificing her allies and friends…

In the distant past, President Romanadvoratrelundar will also do anything it takes to save her world, even if it means sacrificing her own life in the process… Unfortunately for Romana, there is no easy option.

With the threat of impending war, and negotiations still ongoing, the Temporal Powers are growing restless. Every day, they find their future slipping away from them. Every decision they make proves critical. And no one can escape the fact that sacrifices have to be made…

Time is running out… and it’s running straight to Gallifrey.

Written by David Llewellyn, this long-awaited release also marks the return of Seán Carlsen as Narvin and Miles Richardson as Braxiatel; both racing to aid their allies in the current crisis. Opposed to our heroes is Celia Imrie as Livia and Tom Allen as Plutus – who together prepare to make a bid for Gallifrey's Presidency. The set also stars Nigel Fairs as Kalbez, George Watkins as Gaal, Hannah Genesius as Trave, Sean Biggerstaff as Moros and Eve Karpf as The Watchmaker.

Gallifrey: Enemy Lines can be pre-ordered today from the Big Finish website for just £14.99 on CD and £12.99 to download. The prequel series Gallifrey: Intervention Earth is also available; 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.

Six previous series of Gallifrey are still available to order, with single disc releases just £5 each on CD, alongside a range of box-sets. Click here for a full list of titles.