What exactly do billionaires do on vacation? Well, in the case of "Mountainhead" at least, the answer appears to be: watch the world burn, in no small part due to their own actions. An HBO original written and directed by "Succession" creator Jesse Armstrong,

Instead, in the tradition of Armstrong's work on the British series The Thick of It and the film In the Loop, Mountainhead is a comedy — a bleak, brutal comedy, but a comedy nonetheless.

Armstrong’s script is an embarrassment of riches when it comes to the zingers, and you could spend an enjoyable evening in the pub debating your favourite gags, but it would all amount to nothing with...