Other mistake: At the beginning of the episode, the date on the security camera is 29/11/2020, 1:30 am. Later when the policeman checks his phone, it's 30/11, meaning that Pellegrini waited to contact him more than a day. In episode 2, Assane's phone showed the date as Tuesday 27th Oct (timecode around 00:16:30), which would mean if true that they investigated for over a month without discussing with the commissioner the basic details, which of course is impossible. (00:02:30 - 00:13:30)
Other mistake: When we see the close-up of the newspaper headline that says "Ray Parents Slain" at the start of the episode, look at the smaller articles on the close-up side of the screen—they're literally gibberish.
Other mistake: Danny Stevens, an undercover police officer, is killed. The police agree to investigate the murder of his undercover persona, Steve Daniels, thus allowing the investigation of his death without compromising their ongoing investigation into the activities of a drug kingpin. The officer investigating the murder visits the kingpin to ask about Steve's murder. She shows him a photo of the murdered man, but the name across the bottom is Danny Stevens - the policeman's real name.