This series would have been pretty amazing crime series if every case had been as good as the the last case (or combination of cases) involving someone hatching an elaborate plot to take revenge on Dr. Qin. The villain in this case seems a little too resourceful to be convincing. I also wonder why the case that caused the person to take revenge on Dr. Qin isn't fully included as one of the actual cases in this series but is only alluded to. It seems potentially interesting.

The earlier case involving identical twin brothers is also rather interesting. The rest of the series is still pretty good, but I find that some cases get solved too fast and maybe too effortlessly.

The friendship between the three main characters is nicely portrayed, making the characters likable and humane, which helps draw the audience into the series. I have yet to watch the sequels with a different cast, but it would not be easy replacing the original cast in this show.