A time traveler and his companion.
- Whenever you hear the Tardis
- Whenever a Dalek says, "Exterminate"
- Whenever the Dr. uses the sonic screwdriver
- Whenever the Dr says "run"
- Whenever anyone says, "he's the doctor"
- Whenever the Doctor uses his psychic paper (fake ID)
- Whenever the Doctor and companion encounter a famous person from history (ex. Agatha Christie)