Thane (The Power of the Daleks)

Thane was the Chief Medical Officer on the human colony on the planet Vulcan. She was middle-aged and had short blond hair. Thane grew discontent with the Interplanetary Mining Corporation underfunding the colony to keep the whole enterprise "economical". Feeling her lack of advanced equipment was costing lives, she joined the rebels plotting to overthrow Governor Hensell, becoming a section leader.

Thane treated the Second Doctor, Ben Jackson and Polly Wright in the medical bay after they were found unconscious in the planet's mercury swamps, and later called them back for a check-up. She died, along with many others, when the Daleks attacked the colony. (PROSE: The Power of the Daleks)

Behind the scenes
Thane does not appear in the televised version of The Power of the Daleks, having been edited out of the script before filming. John Peel includes her in the novelisation among other restored elements. A woman matching Thane's description given in the novelisation briefly appears in surviving images of the battle during the missing Episode Six, and the 2016 animated reconstruction for which the images served as visual references. It is unclear if there is any real connection between this character and Thane in the novelisation, of if their similar appearances are incidental.