I love the original Twilight Zone by Rod Serling. Its most iconic episodes haunt us and make us think about the world's problems, using the series as a metaphor for what happens in life.

As of today, no anthology series has been able to top what this one does: Leaving you with thought material for days. My favorite episodes are A Game of Pool, Nightmare at 20,000 Feet, The Hitchhiker and 5 Characters in Search of an Exit.