The Lost Planet — George Mann

Nicola Bryant reads an exciting original story featuring the 12th Doctor The TARDIS is under attack. Alien plants have taken root in its corridors, strange flowering tendrils that threaten to rip the Doctor's ship apart. When Brandon and Alex venture into the heart of the TARDIS to discover the source, they find a secret door to a forgotten world. The Doctor has unfinished business with the Arborites, living trees with long memories. Centuries ago he fought to prevent a galactic catastrophe -- but now his past has come back to haunt him in ways he never thought possible.