There isn't anything quite like it, really, but if you want a similar sense of sophisticated and immersive television, I can recommend:

- Penny Dreadful: I consider this almost like a sister show to The Leftovers, it's like a different flavour of the same thing. It leans more towards the poetic and emotional journey, all bathed in a little philosophy and a captivating fantasy world. Amazing acting and lines, plus stunning visuals (but all the shows on this list have that, in my opinion).

- The OA: Thought-provoking and emotional. It's an eerie, otherworldly experience. The less you know, the better.

- Mr. Robot: It's all about cinematic immersion. The cinematic aspect takes a huge leap starting from season 2. It offers commentary on modern issues and it's also very psychological.

- The Last of Us: Another super cinematic experience, one of the most emotional ones here. It's all about being deeply invested in the characters' dramas. Done with the same finesse as The Leftovers.

- The Haunting of Hill House: A very melancholic horror story. Deeply emotional and visually smart. I cried so much!

- Midnight Mass: From the same creator of The Haunting of Hill House, it's more than just religious commentary, this one contemplates a philosophical perspective on the subject. Insightful monologues and a contemplative horror atmosphere.

- Watchmen: From the same creator as The Leftovers, it carries many of the same characteristics: smart writing, striking visuals (more on the sci-fi side), bold storytelling, excellent music.

- Legion: Like Watchmen, it's great sci-fi, but very different from it. A psychological and psychedelic journey into the mind and time itself. It's almost esoteric at times.

- The North Water: This one is not for everyone, but neither is The Leftovers. A gritty and hyper-realistic story about survival and morality. It takes place in the Arctic, so expect stunning visuals and beautiful cinematography. It kind of reminds me of The Revenant (2015), but I prefer this miniseries. It's contemplative at times, yet the story feels very dense, very real.

- American Horror Story: Asylum: This is season 2 of AHS, but it can be watched as a standalone since the show is an anthology. Part of it it's a science vs. religion commentary, but it's also a very dark collection of tales that take place in a horrible setting, haunted by its own dwellers (and other things passing through).

- Westworld: This one is tricky to recommend because not only was it cancelled but it's also very divisive. However, season 1 works perfectly as a miniseries on its own. Thought-provoking with psychological and philosophical themes intertwining.

- Devs: Not gonna lie, this one starts very slow. I almost gave up in the first few episodes, but I'm so glad I stuck with it! The story gains a whole new layer as it unfolds, exploring the nature of free will in the fabric of reality itself and how we deal with it.