Slist Fayflut Marteveerthon Slitheen was a female Raxacoricofallapatorian from the Slitheen family.
While on Gharusa Prime, Slist pretended to be the Ninth Doctor. As "The Doctor", she was the star of the holovid show Doctor Who? and author of "autobiography" Doctor's Orders. "The Doctor" was voted Cosmopolitans sexiest planetary savior for nine years in a row. His companion both in the show and on Gharusa Prime was another Slitheen who assumed a human name of Penny.
She captured Rose Tyler when Rose found out that she was an imposter and took her to Clix as "the Doctor"'s companion instead of Penny. (COMIC: Doctormania)