Triplars
Triplars are a fictional species that appear in the "Doctor Who" television series. They were introduced in the 2007 episode "Gridlock" and are native to the planet New Earth. Triplars are characterized by their distinctive appearance, which includes a tall, slender physique and a smooth, almost translucent skin. They possess a unique vocalization, a series of clicks and whistles that communicate their thoughts and emotions.
In the "Gridlock" episode, Triplars are depicted as living in a technologically advanced but overcrowded city,
The Triplars' role in the narrative serves to illustrate the social and environmental pressures faced by inhabitants