Listen, nobody really knows what the Apple TV+ thriller series Severance is about, other than it follows Lumen Industries, a company "that aims to take work-life balance to the next level." That's an extremely vague description, plus science has proven time and time again that the concept of a work-life balance is a myth. However! Severance, whatever it is, has put together one heck of a cast, which now includes Christopher Walken in his first major recurring TV role, ever. THR has a few more tidbits on the show, noting Walken will play a character named Burt, …