After the "little" disappointing of THE SIX THATCHERS, now comes a decent episode in the series. THE LYING DETECTIVE brings back all the things you love from SHERLOCK. Intriguing and interesting plot? Check. Some mysteries? Check. The twists and turns? Check. I must say in this episode is more a psychological thriller than solving a mystery. Also, there's a hint about Sherlock's past. One of the best episode!