Protagonist; last of the Time Lords

Companion who saw the end of Earth, competed on 'The Weakest Link,' and looked into the heart of the TARDIS

Companion who met Shakespeare, saved the world from The Master, and became a doctor

Companion who helped save the Ood from enslavement, got trapped inside a girl's dream, and was temporarily part Time Lord

Companion who met Van Gogh, grew up next to a tear in time, and waited

Said to have lived millions of years; tells The Doctor a secret with his last words

Companion who unwittingly released a plague in London, often dies (but comes back!), and lead Torchwood

Race that fought the Time Lords in the Last Great Time War; keen on 'exterminating' other races

The Doctor's spaceship, aka Sexy

Family able to disguise itself as human by wearing human skin suits

Companion who was briefly turned into plastic, is Rose's ex-boyfriend, and took over the life of his (dead) parallel self

Race of humans turned into machines; attacked a parallel Earth and the 'real' Earth

Peaceful (unless otherwise provoked) race of aliens that carry brains in their hands

Deadly Assassins that can't kill you if you're looking at them; ''Don't blink. If you blink, you're dead...''

Companion who is a proud nurse, got married, and guarded the Pandorica for 2000 years

Companion who is an archeologist, travels in the opposite direction (time-wise) as The Doctor, and knows his real name

Companion who has known many incarnations of The Doctor, saved a school from the Krillitanes, and owns K-9

Companion who was a waitress on the Titanic and sacrificed herself to save The Doctor

The last human; ''Moisturize me!''

The Doctor's favorite tool; often used as a lockpick and medical scanner