Every season 1 episode is named after a classic film noir from the 1940's or 1950's.

'Poe' is based on the famous writer Edgar Allen Poe, which also gives the name of his hotel 'The Raven' (one of his famous works). The shirt he wears during AI poker match (ep.8 26min) also has the signature of Edgar Allen Poe embroidered on the chest. Coincidentally, James Purefoy (Laurens Bancroft) played a serial killer obsessed with Edgar Allen Poe on The Following (2013).

Joel Kinnaman revealed that all his life he had suffered from a congenital deformity known as Pectus Excavatum which produces a sunken or caved in appearance of the chest and consequently he had always felt very embarrassed to take his shirt off for films or TV. Just before he got the lead role in this show, Kinnaman went through a surgery to repair his chest to lift it outwards to have proper normal shape. Combining that with his physical transformation for the role to achieve his best ever physical shape, he said he was incredibly proud to show off his new body in the show in numerous lengthy shirtless scenes. He said he was shirtless "all the time" and appears shirtless or partially nude in almost every single episode. He said, after getting in great shape, he had no objections to taking off his clothes as many times as the show-makers wanted.

Joel Kinnaman had to go undergo 90 minutes of make-up every morning to cover up all his body tattoos.

Joel Kinnaman said this is the most physically demanding role of his career. Kinnaman said it was his ambition to raise the bar for himself in terms of his physique and action scenes and take it to another level. So he trained for 3 to 5 hours daily for 6 months before filming begin working on various martial art routines to perfect his action sequences as well as bodybuilding, dieting and training in the gym to achieve the right aesthetic shape for his body. Kinnaman ended up achieving his best ever physique for the role packing on a lot of muscle for a sculpted intimidating appearance along with highly shredded six-pack abs to show during his numerous shirtless scenes. Kinnaman revealed that this show was more physically demanding than an action movie because for a movie he has to train for a couple of months and shoot his shirtless scenes in a couple of days and that's it. For this show he trained for six months and had to keep his physical shape throughout the lengthy 10 month shoot as he had to appear shirtless in almost every episode.

Based on the book by Richard Morgan.

The writing on the police vehicle is in Hindi language and the script is Devanagri. It says "Raksha Karna" which means "To Protect"

The Bancroft family, along with other super-wealthy members of society, are referred to as "Meths," short for Methuselahs. Methuselah was a biblical figure from the Old Testament who was rumored to have lived for 969 years.

Takes place in the 25th century.

Was originally going to be adapted as a film, but. the original book's 26th century universe was too dense to be contained into two hours.

The pilot is being directed by Miguel Sapochnik who also directed the episode Battle of the Bastards in Game of Thrones.

At a handful scenes that takes places at "The Raven", you often hear soundtrack from the contemporary jazz and latin band Pink Martini. Solely featuring tracks taken from their first album "Sympathique" (1997).

This is the fourth time Hiro Kanagawa has played a character named Tanaka.

To correct his pectus excavatum condition, Kinnaman's chest had two metal bars inserted through his ribs and into his chest. The bars were then shaped and expanded in such a way that they pushed his chest out, and then were affixed to his ribs to keep them in place. Joel was still fitted with these metal braces while filming this series.

The roof of Head in the Clouds is modeled after the retractable roof of BC Place stadium in Vancouver, BC.

Shot in Vancouver, BC, where Joel Kinnaman also shot "The Killing" (2011) and "Robocop" (2012).

Dichen Lachman and Tahmoh Peniket starred together in Joss Whedon's Dollhouse.

Dichen Lachman, Hiro Kanagawa, Teach Grant, Jojo Ahenkorah and Katie Stewart all starred together in The 100.

Joel Kinnaman and Kristin Lehman both starred in "The Killing".

Joel Kinnaman's physique was used as one of the focal points to market the show as it was getting a lot of attention in the media. Kinnaman underwent a dramatic physical transformation for the role to acquire an extremely bulked up and shredded physique with highly-defined six pack abs which he showed off in countless shirtless scenes. All stills, trailers and clips released for the show included multiple shots of Kinnaman's shirtless physique and Kinnaman spoke at length about his workout regime during every interview to promote the show. To further capitalize on Kinnaman's physique, on 21st February 2018, the show's social media accounts released a highly-shared promotional video titled "Cyber Hunks" that was a montage of all Kinnaman's shirtless scenes including close-up shots of his abs flexing as well as a nude shot. Kinnaman had previously stated that he had no objections to taking off his clothes and in-fact was extremely proud to show off his best ever physique.

The raven hotel AI is called Poe. James Purefoy's character in 'The Following' was obsessed with the works of Edgar Allan Poe and used ravens and Poe as symbolism for his serial cult.

The whisky glasses used along the series are by The Norlan Whisky glass - cited as being the best glasses ever for drinking whisky along with The Glencairn glass.

While infiltrating the "Head in the Clouds," Kovacs, Elliot, Ava, and Mickey use the phrase "Five-by-five" to indicate everything is going well. Mickey is played by Adam Busch, who played the villain Warren on Buffy the Vampire Slayer. On The show, the term "five-by-five" is used regularly by Faith, another vampire slayer.

Joel Kinnaman's character, Takeshi Kovacs, wakes up inside a physically different biologically enhanced 'sleeve' similar to how his character is effectively 're-sleeved' as Robocop, which has been cybernetically enhanced. Both characters struggle to reconcile their previous identities within their new physical forms.

This show references Edgar Allen Poe and James Purefoy started in "The Following" where he played serial killer Joe Carroll who was obsessed with the famed author.

Second show starring James Purefoy after The Following with an Edgar Allan Poe connection.

This is Joel Kinnaman's second time in a lead role which has been brought back from the dead. The first was RoboCop(2014).

The last few lines Poe recited as he was dying was taken from Edgar Allan Poe's "Annabel Lee".

There are several instances of clearly visible paintings depicting Saturn (or the Titan Chronos) devouring his son, Ruben, painted by Peter Paul Rubens and another by Francisco Goya. According to Roman myth (inspired by the original Greek myth), it had been foretold that one of the sons of Saturn would overthrow him, just as he had overthrown his father, Caelus. To prevent this, Saturn ate his children moments after each was born. His wife Ops eventually hide his third son, Jupiter, who eventually supplanted his father just as the prophecy had predicted. This myth is particularly relevant to the plot.

Kovacs uses a sword, bone handled dragon engraved, in ep10 very similar in design to that of Conor McLeod's Immortal Highlander. "Who want to live forever"?