The first episode. It's... a bit out there, and I'd say it doesn't really represent the show all that great. Starting from episode 2, it gets better.

But be aware that there are trigger earnings in just about every episode - violence, sexuality (including abuse), you name it. It's not a pretty show, and the endings oftentimes aren't happy either.

My favourite episodes are probably s02e01 ("Be Right Back"), the Christmas special ("White Christmas"), s03e05 ("Men Against Fire"), and s04e3 ("Crocodile").

Overall, it's a superb series. But if you watch it, you'll never look at a Neuralink or a similar device and think "huh, interesting" instead of "that is a BAD IDEA".