Daleks: The Mutation of Time — John Peel

The Daleks master plan is well underway. With the Time Destroyer, the most deadly machine ever devised, the Daleks will conquer the universe. Only one person stands in their way--the Doctor. For he has stolen the precious taranium core which is vital to activate the machine.

Traveling through time and space, the Doctor and his companions are forever on the move in case the Daleks track them down.

But after several months, to their horror, the TARDIS indicates that they are being followed!