The Doctor's Secret Adventures, Episode 1: Paths Bend

Paths Bend is the first episode (split in two parts) of the Doctor Who spin-off series, The Doctor's Secret Adventures, a series dedicated to one of the most famous Doctors of the entire series, David Tennant.

Cast
The Doctor

Martha Jones

The Doctor

Plot
In the TARDIS, the Doctor, standing ready at the controls, asks Martha where she would like to go. Martha opens her mouth to reply, when the TARDIS picks up a distress signal. As the Doctor notices, he cuts across her saying "Hold that thought," and goes to examine the distress signal on a nearby screen. A few seconds later, the Doctor tells Martha he isn't farmiliar with the language the signal sent, and they both agree to investigate.

When the TARDIS reaches the planet where the signal originated, they both step out of it and see a huge alien metropolis. There are lights in the sky, and, suspecting a celebration, Martha is skeptical that this is the planet where the distress signal originated, but decides to come along with the Doctor, as, according to him, "The TARDIS never lies."