Clara Oswald
“The Impossible Girl”, Clara Oswald appeared in many different forms throughout The Doctor’s adventures after splintering herself across his time stream. Clara was a heroic problem solver, ready to thrust herself head-first into almost any adventure. She later went into semi-retirement and worked as a teacher at Coal Hill School, which Susan Foreman attended years before, before entering into a relationship with Danny Pink.
Glass Avatars from the future don’t care about Data Privacy Agreements while the first and then-latest Doctor do Timelord Kegels to keep their respective regeneration at bay
An undead companion gets a shot at a spinoff and all life in the universe may or may not pay the price for it
Doc heads to Diagon Alley to investigate a pain-in-the-neck countdown and loses yet another companion in the process
Eye-booger monsters, an FPS perspective and heavy Pet’ing didn’t quite detract from the gargantuan plot holes in this one
The Doctor joins a Viking Highlander on a heist plotted by The Lion King
The Twelfth Doctor, Clara and a Viking girl he reverse-remembers meeting at a later date set up Home Alone traps for a Monty Python God
Doc breaks Beethoven’s fourth wall to explain how a tall chap who turns people’s souls into ham radios can plot to invade the Earth from beyond the grave