
Warning - the following contains spoilers for Doctor Who episode 8 'Empire of Death'...
Ever since we first met Doctor Who companion Ruby Sunday (played by the brilliant Millie Gibson) one big question has been left lingering - who is her biological mother? It’s a subject that has come up time and time again throughout this season, growing more critical with every passing episode. Why does it snow around Ruby? Why does her mom seemingly point to the Doctor? Why is the villainous Sutekh so invested in discovering her identity too?