Doctor Who The Mistress Costume
You need the following items for your The Mistress from Doctor Who Halloween costume:
Dress Like Missy/Mistress From Doctor Who

Dress Like Missy Mistress From Doctor Who;
Missy Costume: Missy wears victorian style long skirt of burgundy color and matching coat with white shirt.
Missy Boots: Missy wears black lace up boots.
Missy Accessories: To complete your Doctor Who Missy cosplay costume don't forget to get black onyx ring, brooch charm, lace umbrella and leather bracelet.
Doctor Who Missy Cosplay

Mistress was the female equivalent of the Master title. After regenerating into a feminine form, the master took the name Missy, short for Mistress