Alpida
From Tardis Wiki, the free Doctor Who reference
The Pipe People were the native inhabitants of Terra Alpha. They were forced to live underground when humans colonised the planet. The Doctor helped them start a rebellion against the human population. Once Helen A's government was brought down they started to live with the humans.(DW: The Happiness Patrol)
Behind the Scenes
"Pipe People" was probably a pejorative nickname given to them by the humans. Their real name was unknown.
