Lynda Moss

Lynda Moss — self-identified as Lynda with a Y to contrast with Linda with an I — was one of the Big Brother contestants onboard the Game Station.

Biography
After meeting the Ninth Doctor, he told her that she was "sweet" and asked her to join him on his travels. Lynda agreed and they set out to save Rose Tyler from her "death" during The Weakest Link. (TV: Bad Wolf) Lynda was horrified when Rose was seemingly disintegrated.

Soon afterwards, Lynda met Captain Jack Harkness. In the battle against the massive Dalek invasion, she acted as a coordinator by using the sensors to track Dalek movement. This ended when the Daleks located her. She reported to the Doctor, and he assured her that side of the station was reinforced against meteors. The Daleks began to cut through the door with a torch as Lynda watched. Three Daleks rose outside the observation window. One of the Daleks then shot the window, shattering it, and presumably killing Lynda. (TV: The Parting of the Ways)

Lynda was remembered by the Doctor as one of the people who had died in his name. (TV: Journey's End)

Personality
Lynda was a very bright, bubbly, cheerful person. She became fast friends with the Doctor, which is why he agreed to let her to accompany him as per her request. She was very concerned about what the audience thought of her, asking the Doctor if viewers of Big Brother on Earth liked her. He absentmindedly said people thought she was sweet.

She showed loyalty to and great trust in the Doctor, despite only having known him for a few hours. She stuck by his side assisting him even when she was told to get to safety. She had faith that he would keep her safe and fulfil his promise to take her on the TARDIS with him. Just before she died at the hands of the Daleks, Lynda screamed. (TV: Bad Wolf/The Parting of the Ways)

Lynda continued to haunt the Doctor's memories, along with others who had died in his name. (TV: Journey's End)

Behind the scenes

 * Occasionally Lynda is considered a companion of the Doctor by fans due to her accepting the Doctor's offer to travel in the TARDIS before being prevented by dying.