Doctor Who: Sick Building

Doctor Who: Sick Building by Paul Magrs.
Tiermann's World: a planet covered in wintry woods and roamed by sabre-toothed tigers and other savage beasts. The Doctor is here to warn Professor Tiermann, his wife, and their son that a terrible danger is on its way! The Voracious Craw, a gigantic and extremely hungry alien creature, is heading remorselessly towards their Dreamhome!