Holly (Playing House)

Holly accidentally bought a dying TARDIS at an antiques fair, mistaking it for an ordinary household object. Over the next week, the TARDIS started leaking artron energy, causing her house to appear to have extra rooms. During a game of hide-and-seek, Holly became separated from her family in the shifting architecture.

As she searched, she met the Twelfth Doctor and Hattie Munroe, telling them of her plight. When the Doctor noticed Spyrillites trying to enter, he let them in, gambling that they would lead him to the source of the danger. After the Doctor learnt that they were in a TARDIS, he led them to the ship's console room, finding Holly's family along the way. After the Doctor triggered the TARDIS's dematerialisation sequence, he and Hattie bid goodbye to the family. (COMIC: Playing House)