She liked to say that her nose never let her down, that it could smell trouble. Lernov was worried that Zoe Heriot and Jamie McCrimmon would be killed during the shockwaves from exploding meteorites. She helped the Second Doctor defeat the Cybermen. (TV: The Wheel in Space) She bumped into Zoe after the Time Lords returned the latter to the station and wiped her memory. (TV: The War Games)