One of the more naturally peaceful villains in this list, the Ood are instantly recognizable for their squid-like features. The Ood are also telepathic and communicate through a hand-held orb that's attached to them through their tentacles. Despite their naturally peaceful way of living, the Ood are susceptible to being controlled and possessed by a more powerful telepathic being, which can lead to violence. The Ood are an easily recognizable race in the Doctor Who universe, especially to younger viewers and with multiple appearances since their debut in 2006, are worthy of a spot on this list.