Doctor Who episode 277: Inferno – Episode 6 (13/6/1970)
‘Do you want to end your lives fighting like animals?’ asks the Doctor, as the parallel Earth explodes around them all, a scene that, consciously or not, replays almost the same way as in Survival. The reputation of Inferno is significantly enhanced by this episode which briefly but shockingly presents the apocalypse on a BBC budget in a way that’s every bit as horrible as in Threads. A man sits, shell-shocked, as the planet cracks open. Soldiers run about aimlessly. Fire bursts from the ground, and everything is bathed in hellish orange light.