Cog-i-TATE! COG-I-TATE!

(Actually, not too much cogitation is required, as you’ll quickly notice.)
Sent in by Les, who didn’t have a source (which I always like to credit if possible). @meggorie says it’s by Alex Fernandez, but I couldn’t find any additional confirmation of that.
(If you stumble across a cool Doctor Who thing, feel free to email me with a link.)



















Exterminate! Exterminate!