Tense but improbable. Too many scenes of the detectives entering buildings and bunkers alone - not only without back up but without notifying anybody their whereabouts - more horror film than detective genre. The reveal at the end was unexpected but it left you wondering how he pulled it all off in terms of logistics. I’m not a fan of the psychopath mastermind vs the detective and this series fell neatly into that category. Don’t waste your time.