I've long been a huge John Oliver fan -- no, seriously, a huge fan beyond the norm, even recommending him to a movie producer only six weeks after his first appearance as a "correspondent" on The Daily Show (going so far as having a friend who was a writer on the show put together a reel of Oliver's best work). So, this was a long-awaited treat. And happily, the show did not disappoint. It was quite wonderful.
But at the center was his look at what will happen with the deadline for the official Brexit only weeks ago. It was deeply detailed and informative, highly entertaining, and (at its core, of course, this being a comedy show) incredibly funny.
Side Note: The film project I recommended him for never ended up going forward, so it wasn't a case of him "rejected" by the producer. Just normal Hollywood Development Hell. So, the movie world's loss was HBO's gain.