Last Week Tonight with John Oliver Season 2 Episode 10 Patents ( Air Date 2015-04-19 ) Genre Talk, Comedy, News category. Overview "For inventors, patents are an essential protection against theft. But when patent trolls abuse the system by stockpiling patents and threatening lawsuits, businesses are forced to shell out tons of money. Also, CNN produced an actual doomsday video to broadcast when the world is ending and it’s incredibly dull. We've enlisted Martin Sheen to help make humanity’s final moments happier!".