The languages Tyrell Wellick and Joanna Wellick speak between them are Swedish (Tyrell) and Danish (Joanna). The languages are, together with Norwegian, so similar to each other that if you have a good understanding of one, you automatically have a decent understanding of the other two.
The OS that Elliot uses 99% of the time and the rest of the cast for that matter, is Linux/Unix and Elliot's PC at home is running Kali Linux or some variant, with a Gnome Desktop which is mentioned by Tyrell when they meet for the first time in the pilot episode.
Knowing he was going to direct it entirely, Sam Esmail managed to have the full second season written before shooting it. That way, scenes from different episodes were shot in a row, based on the location available.
For the sitcom sequence in the second season, creator Sam Esmail and his crew researched and consulted with other crew members who worked on 80's/90's multicamera sitcoms, as well as learning how to film an episode in that format. For authenticity, Beta tapes and cameras were used to film the sequence.
in the first season actor Rami Malek used vitamin b pills for the scenes where he sniffs morphine and used a special device hidden in his sleeve to vacuum the powder ,and he used it to prank people in set tricking them into thinking he got addicted to it.
In True Romance, Christian Slater goes to an amusement park and rides a roller coaster with a character named Elliot. In Mr. Robot, Christian Slater goes to an amusement park and rides a ferris wheel with a character named Elliot.
Elliot can be seen writing Wish You Were Here on a CD. His collection also contains Pink Floyd albums, you can spot a Dark Side of The Moon mug in one of the episodes, and at one point during the season he even talks about Pink Floyd among other artists. Krista the therapist also has a Pink Floyd mug on her desk.
In one of Elliot's (Rami Malek) hallucinations/memories, a little girl sings "Frere Jacques". In the video game Until Dawn, Josh, also played by Malek, becomes isolated and insane as a rendition plays in his head.
During the filming of season two, a virtual reality short tie-in was made for the app Within. It was written and directed by Sam Esmail, and starred Rami Malek and Frankie Shaw, reprising their roles as Elliot and Shayla.
In the episode containing Elliot's flashback to his father taking him to see Pulp Fiction, Elliott responds to a question with, "No, I'm pretty far from ok." In Pulp Fiction, following the infamous rape scene, Marcellus Wallace responds to Butch with, "No, I'm pretty fucking far from ok."
Despite the tech savvy nature of the show, Rami Malek tends not to engage in social media such as snapchat, instagram, twitter, etc. As said in his interview with Colbert, he finds it to be too "polarizing."
Season 2 episode with Dominique (Grace Gummer) masturbating beside her laptop shows a screen name of Happyhardonhenry a reference to Christian Slater's movie Pump Up The Volume. In Pump Up The Volume he plays a pirate radio operator nicknamed Happy Harry Hard On.
Scenes shot outside of Elliot's apartment are filmed on location in Manhattan's Chinatown and show the facade of a real apartment building at 217 E Broadway, New York, NY 10002, as well as a real (and, as indicated on the show, really shuttered) Chinese restaurant named Bo Hai Dumpling Town.
The trivia items below may give away important plot points.
In the last episode of season 1, where Elliot is talking to Joanna Wellick, she says something to him in Danish with a sinister smile, to which he replies "Excuse me? I don't understand what you're saying." It's the only part through the whole season that isn't subtitled. The words are: "Hvis du har gjort ham noget, så slår jeg dig ihjel." which translates to "If you have done something to him, I will kill you."
Knowing the truth about the character of Mr. Robot, the actors were instructed to never look or react to Christian Slater in the scenes where Slater and Rami Malek are in the same room, because everything he says is either Elliot's imaginations or Elliot is the one saying it.
At the end of episode 9, when Elliott and Wellick enter the arcade, a cover of The Pixies' "Where is my mind" is playing. This is an homage to the final shot of David Fincher's "Fight Club", from which the show borrows a lot.
In the final scene of season 1, when White Rose discusses Nero fiddling as Rome burned, the harpist is playing Nearer, My God, To Thee. This was rumored to be the final song the band played as the Titanic sank.
Although Christian Slater (Mr. Robot) plays Rami Malek's (Elliot) father, in real life Christian Slater is only 11 years older than Rami Malek. This is appropriate as the Mr. Robot figure is Elliot's memory of his late father's appearance.
The date shown on the lock screen of the phone in Season 2 is Sunday, June 15 suggesting that the show might be set in 2014. However, the FBI report indicates fsociety's headquarters was located on 6/22/15
In episode 9, Elliot uses VMS (virtual machine software) to view his father's old pics in Windows 7 based platform.Also when he hacks jail's network in car. VMS is widely used even today, by most of the software engineers.
The "five-nine" hack (named after the day it supposedly happens) is a reference to "five nines", which is a colloquial way of referring to high availability of services, when predicted downtime is less than 5.26 minutes per year.
In season 2, episode 11, when Angela gets kidnapped "Marvin Berry & The Starlighters - Night Train" is played in the truck. A well known jazz song from Angela & Elliots favorite movie Back To The Future II.