Doctor Who: EVERY NuWho Villain And Monster Ranked Worst To Best
6. Bonnie
Appears in: The Zygon Invasion/The Zygon Inversion.
Even though Jenna Coleman's Clare Oswald character is a bit of a mixed bag, there's no denying her brilliant acting chops which she flexes with zeal during Series 9's excellent and affecting Zygon two-parter; and playing a villain is always more fun.
The villain, in question, who Coleman plays is Bonnie, the leader of the splinter group of Zygons who have had enough of living (hiding) peacefully amongst humans and, instead, want Zygonkind to reveal themselves in all their red sucker and bad breath glory and usurp humanity
Bonnie is a totally badass bitch. She smiles with sinister satisfaction when UNIT troops are killed right in front of her and when blowing up the Doctor's presidential plane with a bazooka. She reveals an even nastier side by forcing a happy, innocent Zygon to irreversibly reveal their true form to the world, which leads to tragic consequences.
It's also the subtle yet defined characteristics that Coleman manifests as Bonnie which make her such a compelling antagonist: the tied back hair, the master manipulation in asking all the right questions here and there for a tactical advantage, and the overall posher tone of voice that automatically gives her a pervading air of superiority.