Doctor Who: Something Borrowed

Eleven Doctors, eleven months, eleven stories: a year-long celebration of Doctor Who! The most exciting names in children's fiction each create their own unique adventure about the time-travelling Time Lord.
A wedding on the planet Koturia turns out to be a far more dangerous proposition than the Sixth Doctor and Peri ever expected. It marks the return of a formidable old foe whose genius matches the Doctor's. Can the Doctor outwit this villain, save Peri and stop the weeding in time?