Ruby Sunday
played by Millie Gibson

Ruby Sunday and Jocelyn Sancerre

from

Space Babies

Ruby: Hang on, so the planet below down below who refused to stop the babies being born... But once they're born then don't look after them?
Jocelyn: It's a very strange planet.
Ruby: It's not that strange.

Ruby, a foundling, is helped by the Doctor when goblins try to take her baby foster sister. The goblins try to take revenge by taking Ruby out of time. Rescued by the Doctor she joins him on his travels until she finally meets her birth mum and stays on Earth, joining UNIT.

First regular appearance: The Chursh on Ruby Road

Final regular appearance: The Empire of Death

Ruby Sunday has met the following Doctors
Ruby Sunday has appeared in the following adventures