Doctor Who episode 407: Planet of Evil – Part Two (4/10/1975)
There’s a thing that Tom Baker does as the Doctor where suddenly the flippancy stops and he snarls the lines, low and furious, to suggest that behind the façade of facetious eccentricity there’s a serious intelligence. It crops up most notably in The Pirate Planet – ‘You ask me to appreciate it?’ – and often in Big Finish, but the first obvious example is in this episode, where the line ‘Get back! Didn’t you learn anything?’ is practically spat in a Morestran crewman’s face.