Box set of Doctor Who adventures from the Tom Baker / Peter Davidson years. In 'The Keeper Of Traken'(1980), Baker's penultimate turn as the Doctor, he and Adric, fresh from E-Space, are summoned to the peaceful planet of Traken. Dark forces are at work, and, as usual, the Doctor gets the blame. The Trakenites would do better to look to the Melkur statue in the Grove, in reality the base for the Master. In 'Logopolis' (1981) the Doctor (Baker in his final adventure) and Adric become caught up in a plot by the Master to gain control of the Universe via the Logopolitan art of block transfer computation. Instead, he releases the forces of entropy, causing the fabric of Space to unravel, and the Doctor must join forces with his deadliest foe to prevent the destruction of the entire cosmos. 'Castrovalva' (1981) is the debut adventure for the fifth incarnation of the intrepid Time Lord. The Doctor's (Peter Davison) regeneration is failing; with Adric kidnapped by the Master and the stable environment of the Zero Room jettisoned, it is up to Tegan and Nyssa to pilot the TARDIS to Castrovalva, the only planet in the Universe tranquil enough to aid the Doctor's recovery. But all is not as it seems on Castrovalva, and the Doctor must act quickly to save himself and his companions from the Master's space/time trap.