Yes, subtitles will help, and the alternating time frames and locations are initially a tad confusing. But for those who love top quality British drama, with a superb cast headed by Damian Lewis, Guy Pearce, and Anna Maxwell Martin, the effort is well worth it. Once in sync with the multilinear storytelling framework, we were increasingly engrossed with this nuanced, powerful and poignant depiction of one of the most fascinating modern espionage sagas. The entire story is a puzzle which the viewer is invited to piece together. Loved every minute! One of the best shows we’ve seen in years.