Vortex Ice / Cortex Fire is one of three main range 2017 Doctor Who titles consisting of two two-part stories, in a change from the usual four-parters. Vortex Ice by Jonathan Morris. 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. Cortex Fire by Ian Potter. The Doctor brings Flip to the futuristic city of Festin, the best vantage point to witness a unique astronomical light show. In a city governed by the all-powerful network known as the Cortex, they're soon identified as outsiders - nihilists, perhaps, responsible for a wave of terror that's been sweeping the city...But the truth is different. The people of Festin are burning up. Spontaneously combusting. And no-one knows why. Star Colin Baker played the Doctor on television between 1984 and 1986, and has found a new legion of fans through his work with Big Finish. Lisa Greenwood plays companion Phillipa "Flip" Jackson, and will be familiar to some from TV shows such as Call The Midwife, The Hours and Eastenders. CAST: Colin Baker (The Doctor), Lisa Greenwood (Flip Jackson), Shobu Kapoor (Sai Chopra), Orlando Seale (Dylan Argent), Monty D'Inverno (Jannik Woolf), Rebecca Todd (Khoralla), Simon Kane (Halus), Eve Webster (Bav/ Cortex/ Enforcer).

It’s L/Wren Mrs Constance Clarke’s birthday – and Flip is determined to make it an anniversary to remember. The futuristic colony of Formicia, where the pampered populace pass their days in endless leisure, seems the perfect place for a `Wren Party’. But all is not as it seems. Looking down from the Middle, the skyscraping tower that ascends as far as the colony ceiling, Formicia’s overseers can see that the Doctor doesn’t fit in – and it’s not just his coat that makes him conspicuous...“ The End is the Beginning,” say the propaganda-like posters all over Formicia. Because to be part of this perfect society comes at a price. And the Doctor's already in arrears. Big Finish have been producing Doctor Who audios since 1999, starring Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant and John Hurt. Colin Baker reprises his role as the Sixth Doctor, or "ol' Sixie" as he refers to the character he's played for nearly 100 Big Finish productions! Miranda Raison, playing a war time WREN travelling with the Doctor, is a regarded British actor from stage and screen, including a notable run in BBC1's Spooks. CAST: Colin Baker(The Doctor), Miranda Raison (Mrs Constance Clarke), Lisa Greenwood (Flip Jackson), Mark Heap(The Middleman), Sheila Reid(Janaiya), Wayne Forester (Roman), Hollie Sullivan (Olivia York), Chloe Rickenbach (Chloe).

Bath, 1756 – and a very dashing gentleman known only as the Doctor is newly arrived in town, accompanied by his lady friends Mrs Clarke and Mrs Ramon. He’s created a stir among the gentlefolk of Georgian high society – and a stir in the heart of merry widow Mrs Theodosia Middlemint, rumour has it. They are not the only strangers from abroad causing tongues to wag, however. The mysterious Lady Clara, come from Amsterdam in the company of the noble Captain Van Der Meer, has the whole of Bath agog. Who is she, really? What is she, really? But there’s something terrible beneath the veneer of Georgian gentility. As awful a horror as the Doctor has ever exposed, hidden inside Balsam’s Brassworks. Something that needs to be brought to light, for the sake of all humanity.Cast: Colin Baker(The Doctor), Miranda Raison (Mrs Constance Clarke), Lisa Greenwood (Flip Jackson), Glynn Sweet (Sir Geoffrey Balsam), Georgina Moon (Mrs Middlemint), Liam McKenna (Titus Craven), Wayne Forester (Rev Mr Philip Naylor), Giles New (Captain Douwemout Van Der Meer), Diveen Henry (Sarah), Ben Arogundade(Gorembe) Big Finish have been producing Doctor Who audios since 1999, starring Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant and John Hurt. Colin Baker reprises his role as the Sixth Doctor, or "ol' Sixie" as he refers to the character he's played for nearly 100 Big Finish productions! Miranda Raison, playing a war time WREN travelling with the Doctor, is a regarded British actor from stage and screen, including a notable run in BBC1's Spooks. CAST: Colin Baker(The Doctor), Miranda Raison (Mrs Constance Clarke), Lisa Greenwood (Flip Jackson), Glynn Sweet (Sir Geoffrey Balsam), Georgina Moon (Mrs Middlemint), Liam McKenna (Titus Craven), Wayne Forester (Rev Mr Philip Naylor), Giles New (Captain Douwemout Van Der Meer), Diveen Henry (Sarah), Ben Arogundade(Gorembe).

Big Finish have been producing Doctor Who audios since 1999, starring Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant and John Hurt. Colin Baker reprises his role as the Sixth Doctor, or "ol' Sixie" as he refers to the character he's played for nearly 100 Big Finish productions! Miranda Raison, playing a war time WREN travelling with the Doctor, is a regarded British actor from stage and screen, including a notable run in BBC1's Spooks. CAST: Colin Baker(The Doctor), Miranda Raison (Mrs Constance Clarke), Lisa Greenwood (Flip Jackson), Scott Chambers (Andy Clover / Sergeant Webster), Pippa Nixon(Joanna Nash), Jo Woodcock(Susannah Nash), David Graham (Percy Till), Brian Protheroe (Captain Hardwick), Chris Dale (Soldiers /Static).