Creet was a young human boy who grew up on the planet of Malcassairo, and was due to fly to Utopia. He helped out at the refugee base. (DW: Utopia)
Creet's Legacy
When Martha Jones, Thomas Milligan, and Professor Alison Docherty set a trap for one Toclafane by using a powerful electric current to bring it down, and see a distorted human-like face, surrounded by machinery. When the Toclafane talks about the 'skies being made of diamonds', she remembers Creet saying this about Utopia, and it confirms to her what she suspected about the Toclafane and their origins. (DW: Last of the Time Lords)