LARS MEIER MENTIONED. Now that I have your attention. The first lime of the Wikipedia section for the first episode of this season said, "an unspecified amount of time after the end of the third series." Now, let's say the first season took place in 2018, that'd mean that the second season also took place in 2018, starting right after Eve stabbed Villanelle, and maybe going a bit into 2019. A little bit of time passed from the end of season 2 to the beginning of season 3, and from the end of s3 to the beginning of s4. Now, Fernanda said she and the man she was married to in Cuba had been married for 5 years before he skipped out on her. Now, that means that they were married from circa, if we say s3 took place in 2020, late 2020/early 2021 to about 2025. Now, the man is probably Konstantin who is now a governor of some sorts in a town/village that uses the Cyrillic alphabet. At first I thought of Bulgaria, but I'm not sure if you're allowed to run for official office if you're foreign in Bulgaria so let's just go with Russia. Long story short. Killing Eve season 4 probably happens in 2026, maybe 2028. Now hello, Mr. Meier.