Heidi is a fictional character portrayed by Barnaby Kay in the TV series Doctor Who.
In the first episode they appeared in, titled The Girl Who Died (season 9), they were 48 years old.
They appear in 1 episodes out of a total of 166 aired
Episodes1
The Girl Who Died
episode S9.E5 october 2015In a Viking village, a girl named Ashildr is about to make a desperate mistake. The Mire are the deadliest mercenaries in the galaxy, famed for showing no mercy and Ashildr has just declared war on them. The Doctor and Clara have 12 hours to turn a peaceful village into strong fighters, ready for the deadly Mire.