If there's one thing Doctor Who is famous for beyond time-travel adventures, sonic gadgets, and regeneration, it's the show's incredible lineup of terrifying creatures. As we welcome a new season, we're revisiting the Doctor's greatest adversaries to spotlight the most ruthless monsters the Time Lord has ever faced.
A Few Ground Rules
Before we dive in, some important notes: We've excluded villains that don't quite fit the classic "monster" definition (so don't expect the Master here). Also, while some creatures originate from the classic series, every entry on this list has appeared at least once since the 2005 revival. We simply find the modern-era monsters more impactful (and frankly, they're more familiar to most fans today). With that out of the way, let's begin. Here are our picks for the 20 most fearsome Doctor Who monsters.
The Most Terrifying Doctor Who Monsters of the Modern Era


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