Ep 11. The Lodger

The Doctor is back, and he's got a brand new companion in tow. In this episode titled "The Lodger," he finds himself stranded in contemporary Earth, unable to operate the TARDIS. In order to blend in, he decides to rent a flat with a fellow lodger, Craig Owens.

As the Doctor tries to adjust to living a normal, human life, he begins to realize that there's something very wrong with the building he's staying in. People are disappearing, and the building's strange architecture seems to be at the heart of the problem.

To make matters worse, the Doctor is forbidden from investigating by a strange force field that prevents him from leaving the flat. Forced to stay put, he sets about trying to solve the mystery from within.

With only his wits and a little help from Craig, the Doctor uncovers a plot by a group of aliens who plan to convert Earth into their new home planet. But to stop them, he'll have to find a way to break the force field, get back to the TARDIS, and set a plan into motion to defeat the aliens once and for all.

As usual, "The Lodger" episode of Doctor Who is chock full of quirky humor, nail-biting suspense, and plenty of twists and turns. It's a must-see for fans of the series, and a great introduction for anyone who's never watched Doctor Who before.