Doctor Who: EVERY NuWho Villain And Monster Ranked Worst To Best
57. Zygons
Appear in: The Day of the Doctor, The Zygon Invasion/The Zygon Inversion.
Like many other species, Zygons have their good and bad bunches. The good ones, only want to be left alone to simply live a quiet life amongst the indigenous species, which is possible due to their shape-shifting abilities. When they're bad - like Bonnie/Zygella - they can threaten such a peaceful coexistence, as we saw in Series 9's excellent, thought-provoking, two-parter.
The big red rubbery things that are covered in suckers aren't the most pleasant to look at, but if you do happen to snog one, just beware of the venom sacs in the tongue.