After crashing in 2020 London, the TARDIS crew has found the future of the universe altered and the human race doomed. As the Doctor tries desperately to unravel the paradox, all roads lead back to Baker Street, and the greatest test of all... 4.1 - Crossed Lines by Matt Fitton. The Doctor interrupts a pivotal journey for young Robin, while Tania and Helen are caught up in events past and present. As the timeline dissolves and the Void encroaches, the Doctor's friends ask the Curator for help. But he is not the man he was... 4.2 - Get Andy by Lisa McMullin. The Doctor resolves to make a difference and save one life in particular. But someone else is making a beeline for Sergeant Andy Davidson. Mr Bird has something to prove, and he will go to any extreme to do it... 4.3 - The Keys of Baker Street by Roy Gill. Homing in on the root of the problem, the Doctor attempts a risky solution - and disaster strikes. Soon, 107 Baker Street is all that's left of reality, as the residents climb the floors to face their destiny. 4.4 - Best Year Ever by John Dorney. What happens if the world is actually fixed? There are times when even the Doctor cannot help. And whatever the outcome, Liv and Tania have a decision to make. CAST: Paul McGann (The Doctor), Nicola Walker (Liv Chenka), Hattie Morahan (Helen Sinclair), Rebecca Root (Tania Bell), Tom Price (Sergeant Andy Davidson), Avita Jay (Zakia Akhtar), Colin Baker (The Curator), Jeremy Clyde (Tony), Alan Cox (Ken Bright), Joel James Davison (Robin Bright-Thompson), Clive Wood (Mr Bird), Amina Zia (Aisha Akhtar). Other parts played by members of the cast.

Axos has been freed from the time loop, and is plotting to drain Earth's energy. Without the Doctor's help to stop the powerful space parasite, UNIT are forced to rely on a multipersonality renegade Time Lord... known as the Eleven. UNIT Chief Kate Stewart and her squad now have to confront her father's past foe...Contains four new adventures: 3.1 The Vulpreen Encounter by Andrew Smith When a forty-mile long asteroid drifts into the solar system, Osgood and new UNIT recruit Lt Jimmy Tan are sent to investigate on board the newly-built UK spaceship Starseeker. Kate Stewart visits a UNIT safe house in Norway where Jacqui McGee is recovering from the trauma of her experiences at the hands of the Vulpreen. She needs Jacqui's help against the Vulpreen threat - but can she be trusted? 3.2 By Jacqui McGee by Lisa McMullin As Kate Stewart and the UNIT team race to escape a Vulpreen assassination squad, Jacqui McGee uploads the most important report of her career. Vulpreen Commander Krillen is coordinating a hostile operation across planet Earth. But are the Vulpreen planning an immediate attack, or do they have something more sinister in mind? 3.3 Axos Unleashed by Katharine Armitage With the threat of a Vulpreen invasion imminent, a new menace presents itself in the shape of golden humanoids. A foe from UNIT's past. Axos has escaped the Time trap it was placed in years before and has returned to feed off the Earth. 3.4 Time of the Vulpreen by Roland Moore UNIT coordinates a worldwide response to the arrival of Vulpreen Arches across the globe. Troops stand ready to face the invaders. Kate Stewart and Osgood form an uneasy alliance with the Eleven to destroy the time fields that protect each Arch and which are being used as a devastating weapon by the Vulpreen. But when the invasion starts, the odds may be stacked too heavily against them... CAST: Jemma Redgrave (Kate Stewart), Ingrid Oliver (Osgood), Mark Bonnar (The Eleven), Eleanor Crooks (Naomi Cross), Daniel Easton (Daniel Hoyer/Vulpreen Deputy), Richard Goulding (Axos/Axons), Chris Lew Kum Hoi (Lieutenant Jimmy Tan), David Holt (Commander Krillen), James Joyce (Captain Josh Carter), Glen McCready (Vulpreen), Suan-Li Ong (Yang Li/Private Burgess), Alisdair Simpson (Lord Varliss), Sam Stafford (Private Moorey/Butler), Tracy Wiles (Jacqui McGee). Other parts played by members of the cast.