@DaveHiggins @jlward My sister had a tea-towel designated for hiding behind during frightening Dr Who bits. I was nervous of going in the sea for years after the "haemovore" episodes (The Curse of Fenric), due to a lurking fear that those long marine vampire claws​ might pull me beneath the waves.

Of course, when we're thinking about terrifying alternate shared reality, let's not forget Ghostwatch. A quarter century on and I still can't watch clips of that without freaking out.