Tegan Jovanka

Tegan was an argumentative Australian airhostess who walked into the Tardis thinking that it was a regular police box after her car broke down on a motorway. She became involved in the Master's battle with the Doctor when he regenerated, and she then found out that the Master had murdered her aunt Vanessa. Tegan constantly criticised the Doctor's attempts to control the Tardis. After Adric was killed, the Doctor eventually got Tegan home after the battle with the Daleks and she thought that she had seen enough people die and that she wanted a rest.

Tegan was in Logopolis to Resurrection of the Daleks, plus a memory in The Caves of Androzani: Episode 4.