Last Week Tonight returned from its hiatus just in time for John Oliver to explain Brexit, “the playful fun name that has been given to a disaster.” While the U.K. is not scheduled to leave the E.U. until mid-March, Oliver says the planned departure has already had an impact on the nation’s economy, causing the British Pound to drop almost 14%. Prime Minister Theresa May has spent the last two years locking down the terms of the U.K.’s exit from the E.U., but when she put the details to vote, she was served the biggest defeat in commons history.