Based on a script by Russell T Davies, the spectacular second adventure for Doctor Who's 60th anniversary features David Tennant as the Fourteenth Doctor and Catherine Tate as Donna Noble.

"Oblivious to the profound grief it has caused the Seeker, the cat continues to meander through time and space wherever its mood takes it. Occasionally evasive and consistently playful, it threatens to destroy what little control the sorcerers have over the realms, and unravel what the Seeker knew to be true of magic itself!"-- Back cover.