An easy one, this one. (Was going to do a big multi-doctor Venn diagram, but most of the Doctor Who enemies are one-offs and an 11-way Venn diagram is an ugly thing.)
NOTE: So much discussion on this one! So much Whovian knowledge among us. Many have noted that Cybermen also appear to Ten. Suggestions so far for what might go into the yellow portion include: The Silence, The Minotaur.
Anime-style Doctor Who Season 5 & 6 art
oh sweet time lord I finished it orz orz
Doctor Who Season 5 & 6 (but not all of it, really) in one pic, guys
personally, I love how the cyberman turned out. The astronaut can go hide in the Pandorica for all I care.