In the Netflix series “Adolescence,” we have no idea why Jamie Miller (Owen Cooper) is arrested at the beginning of the first episode. The tension from seeing a helpless 13-year-old boy escorted to a police station and interrogated holds us to the screen. Every minute of the one-hour episode, shot in a single continuous take, makes us feel like we are in the police station with the Miller family, viewing things through his parents’ disorientation.