Doctor Who: The Newbies Guide
The Invisible Enemy
This is the second story in Season 15.
The Fourth Doctor dresses in a rather bohemian outfit, notable for its long scarf. He is somewhat alien, willing to play the fool, and almost never gets on with authority figures.
Leela is a member of the Tribe of Sevateem. They are descendants of human colonists who were bred for physical prowess and lived in a technologically primitive society. Leela is inclined to violent solutions to problems. She carries a knife and a deadly plant called a Janis Thorn.
K9 is a new character. This is his first appearance.
Recurring and Historical Characters