In one parallel universe, a version of the Doctor was pursued by the Time Lords. He commited suicide by jumping off a pylon in an attempt to avoid capture, and, in the process, regenerated into a female, began to hide on Earth and passing herself off as an alcoholic woman working for Sainsbury's. (AUDIO: Exile)
Species
This dimension's War Lord and his people were dematerialised by the Time Lords - although accidentally before they fully passed sentence.
Other alien races that were mentioned to have appeared included the Quarks.
In this universe, it was against the law of the Time Lords to regenerate into a different gender. (AUDIO: Exile)