Trickster's Brigade

Trickster Brigade were beetle-like creatures that fed on time. They de on time and changed timelines. They are also known as Time Beetles

One Trickster Brigade attached to Donna Noble on the planet Shan Shen. The change it caused was to stop Donna from working at H.C. Clements. This in turn stopped her from meeting the Doctor, and so he died in the Empress of the Racnoss's lair under the Thames Barrier. However, with the help of Rose Tyler from Pete's World, this change in history was reversed and the Trickster Brigade died. (DW: Turn Left)