Einar Kuusk (born June 22, 1989) is an Estonian actor and director known for playing Arkady Kachimov in Netflix's "Luther: The Fallen Sun", one of the covert operatives in the first season of BBC's crime thriller "The Capture", Martin in Estonian road-trip comedy film "Chasing Ponies", his post-apocalyptic sci-fi short film "The Most Beautiful Day" and his YouTube videos.