It was a very nice ride to see all god quiz seasons and then after seeing season 4 i can honnestly say i like this one the best of all of them. Story: It continues after season 3 which i liked and it went on with all the crazy investigations.It was also nice to see the romance evolve more between Dr han and Kang Kyeong Hee which brought a bit more life in the series.The thing that i dont like is that every season there are new actors inside and the genius computer hacker wasnt there anymore and he was in all previous 3 seasons.Then again in season 3 there wasnt Kang Kyeong Hee which was a dissapointment for that season since she is my favorite actor in the series.However it all connected to each other all seasons and this one is ended again with a open possibility for more god quiz which i like :). I liked this season most because it was the most easy going of all of them.Not to much pressure on Dr han and his problems and his brain and i think the investigations where a bit eassier to understand. Conclusion: A very nice show that can continue till season 10 all i care of:).The investigations are fun to watch and interesting.I would suggest this show to everyone that likes crime/investigations and you wont regret watching it :).