The Day the Earth Stood Stupid

This is definitely one of the best episodes in the entire series, personally my second favorite after Late Philip J. Fry(6x7). It starts with a destruction of a planet by huge explosion caused by flying brains, which make people stupid, and now It's Earth's turn... Leela goes on a journey to the Center of the universe to find out how to save the planet, and creatures who she thought were dumb reveal their true forms, as a dominant race of on the entire universe, they tell her that only one person can save Earth and guess who is that..

This episode is so action filled, atmospheric and funny, that you won't get bored during watching it, I recommend to everyone !