Do (pronounced Doe) is the evilest of the Telotubs and is a rival of Po. He can breathe out fire, and and is skilled in evil magic. He is the most powerful Telotub and has easily outdone the Telotubs as they are stupid apart from Doopsee and Tonky Wonky. Do is the most similar of the Telotubs to their Teletubby equivalents, being cunning like Po, and as evil as the Teletubbies.
Do's creation is a mystery, as nobody knows how such similar creatures to the Teletubbies that aren't part of the Teletubbies species could possibly exist. Some beleive Adolf Hitler created Do and the Telotubs. Do was created mainly through his sheer force of will and determination, which was why he was the most similar. They were all stupid, but he spent a lot of time on Doopsee, and he was clever.