Now we come to an end. THE FINAL PROBLEM is a very good FINAL in the series. It doubled its mysteries, thrills, and it has a very surprising twist than last two episodes. In this episode, the storyline is becoming more interesting and intriguing. It's fun to see Sherlock Holmes, John Watson, and Mycroft Holmes in action together to fight the villain. Maybe, it isn't good as THE LYING DETECTIVE. But it is still good..