If you want a full sense of Mary Tamm, check out this BBC piece honoring her life’s work.
The actress played Romana, a Time Lady from the Doctor’s home planet of Gallifrey, alongside Tom Baker’s Doctor and his robot dog K-9 in a season of six connected stories in 1978-9.
Her first story, The Ribos Operation, saw her join the Tardis crew on a quest to find the six scattered segments of the Key to Time.
Romana’s other adventures included a story called The Pirate Planet, written by Douglas Adams, and The Stones of Blood, which was the 100th story since the sci-fi show started in 1963.
Dang.
Aw, now I’m sadder that I reblogged that .gif set earlier. May her last regeration bring her to peace.