Helena (Eye of the Gorgon)

Sister Helena was one of the nuns at St Agnes Abbey. She and the other nuns, while being mentally influenced, looked after the Gorgon. She also went to Lavender Lawns looking for the Talisman. She then went to Sarah Jane Smith's house and tried to get hold of Luke and Clyde but failed. She later captured Luke and locked him up. She and the other nuns were freed from the Gorgon's mental influence when the Gorgon was defeated. (TV: Eye of the Gorgon)