10 Smartest Villain Plans In Doctor Who

10. Miss Foster (Partners In Crime)

One surefire way to invade without resistance is to trick the population into thinking you’re offering them something they want.

That’s the tactic Matron Cofelia (under the alias Miss Foster), took when she was tasked with finding a new breeding world for the Adipose. She capitalised on 21st century Britain’s obsession with weight loss by distributing a too-good-to-be-true diet pill – which, when activated, turned excess human fat into Adipose babies.

It’s the one plan on this list that, in fairness, might have actually benefitted humanity under more agreeable conditions. Even the Doctor eventually admits that, "As a diet plan, it sort of works". It's just a shame that using a level five planet for breeding is against galactic law!

Besides, Miss Foster had her eyes on much more than just weight loss. Ultimately, she planned to conduct emergency pathogenesis – a process by which human hair, bones and organs can also be converted, leaving nothing left.

The Doctor was able to put a stop to this scheme by hacking the Adipose Computer, but there was nothing he could do about the Adipose that had already been bred, other than to let them live. Which means that, to quote the Doctor himself, Miss Foster's plan "sort of" worked.