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(Хамелеон): Often referred to as Season 3 or 5 depending on the platform's numbering. It also features 4 episodes and focuses on a serial killer who murders women on romantic dates.

: Nina, an expert verifier who can detect lies through micro-expressions, begins teaching a course on the "Psychology of Lying" at a law school. (Хамелеон): Often referred to as Season 3 or

For further viewing or detailed episode guides, you can visit Kino-Teatr.ru or watch episodes on YouTube . For further viewing or detailed episode guides, you

: A student named Kristina asks Nina to check her stepfather, whom she suspects of murdering her mother. Meanwhile, a serial killer nicknamed "The Roman Executioner" begins a series of ritualistic murders, and Captain Skvortsov must solve the case with Nina's help. Summary of Other 2020 Releases In 2020, another 4-episode installment was also released: Summary of Other 2020 Releases In 2020, another

: Agata Mutsenietse (as Nina) and Mikhail Pshenichnyy (as Captain Skvortsov).

The text you provided refers to the Russian detective series (Я знаю твои секреты). Specifically, it points to the 4th season , titled "The Roman Executioner" (Римский палач), which premiered in 2020 . Season 4: "The Roman Executioner" (2020) This season consists of 4 episodes .