I'm not crazy about "The Tenth Planet" but it's far superior to "Reign of Terror." The ADHD editing alone makes "Reign of Terror" unwatchable. Meanwhile, "The Invasion" is brilliant. It's got this spooky, noir-ish tone that takes every advantage of the animated medium. And while the animation isn't photo-realistic, the characters are drawn plainly enough that it's always clear what's happening and who is doing what. "The Moonbase" & "The Ice Warriors" mimic the drawing style of "The Invasion" but lack the imagination & composition. They basically just use animation to give us their best guess interpretation of what the original, mundanely-staged live action episodes probably looked like.