Place of Origin:
Teresa Hart was a a waitress in a Mayfair gambling club, (Doctor Who and the Talons of Weng-Chiang) whom Li H’sen Chang followed home one day in 1889. He confronted her as she was about to enter a house and hypnotised her into accompanying him to the Palace Theatre.
Chang intended to use a catalytic extraction chamber to distill Teresa’s life for Magnus Greel. Leela found Teresa in the theatre and, as she was unresponsive, took her clothes and dressed in them, putting Teresa in a wardrobe.
When she woke, Teresa was confronted by Casey, who attempted to hurry herout of the building. She saw Chang’s face on a poster and quickly left of her own accord, fleeing in fear. (The Talons of Weng-Chiang)
BEHIND THE SCENES
Teresa is never referred to by name in the on-screen dialogue; her name is given only on the closing credits.
Although never mentioned as such on-screen, Terese is described in the script for the Talons of Weng-Chiang part three as being “a lady of the night”, i.e. a prostitute. (The Talons of Weng-Chiang)