Tanya Lernov

Tanya Lernov was an astronomer on Space Station W3. She was concerned about the sudden drops in air pressure on the station.

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)

Lernov later came across Zoe after the Time Lords returned her to the station at the exact moment before she went away with the Doctor, thus erasing her memory of all but her first adventure with him. Lernov asked if the Doctor and Jamie had left, and Zoe said she had just seen them off. Zoe also mentioned to Lernov that she had a vague feeling of having forgotten something important — but then dismissed this as nothing. (TV: The War Games)