The reasons I had anticipations for this mini drama were:
1. It's Apple+
2. The amazing cast
3. The storyline

The fears I had:
1. It's a debut for Apple+
2. The drama is only 6 episodes
3. The director's debut in drama

And overcoming all my expectations as well as doubts, Dr. Brain has been able to present itself as a series of quality and it's an absolute treat, I want to aasure y'all that.

Dr. Brain (브레인) is adapted from the webtoon with the same title writhen by Artist Hong Jac Ga (홍자가).

Dr. Brain is basically a sci-fi plus investigative mystery thriller keeping Koh Se Won (Lee Sun Kyun) at the center of the story. He's a brain scientist who has been working on syncing two brains for a long to establish communication through memories. Born with peculiar brain characteristics he has had a horrible past yet manages to make family and do excellently well in his career. One day his world breaks apart as his family falls victim to terrific accidents in a short span of time, but being an emotional man, he rather invests even more time in his research. And oweing to his inventions he now start accessing memories of his wife as well as the people around her to get to the root of everything. He puts the best of his efforts to combine the fragmented memories together in order to draw a complete figure. And while doing all these, he gets to unveil the conspiracies and the biggest culprits who have made him miserable.

I must say, the plot development is absolutely wow in here. For a 6 episode mini-drama, it is very important that each and every part should impress the audience, which was successfully achieved by the drama. I personally wasn't much intrigued by the 1st episode (except the neuroscience research stuffs, since I am a post-grad guy in zoology) but the 2nd one got me awestruck, ngl. The suspense buildup throughout the series is indeed marvelous and the progression is well executed. The way everything unfolds bit by bit using the pieces memories from various different persons is really very intriguing as the story progresses. The revelations have been made at appropriate timings and the pacing of the entire show couldn't be more perfect.

I can't help but praise so much about the acting area of the drama. Not just that the drama has several master actors, also we saw their acting graphs rising to some other level than before. Ahhhhhhhh! The feelings of witnessing their plays is something unexplainable. Apart from Lee Sun Kyun at the top, we also have here: Park Hee Soon (Lee Kang Mu) as a private investigator, Lee Yoo Young (Jung Jae Yi) as Sewon's wife, Lee Jae Won (Hong Nam Il) as Sewon's colleague and Seo Ji Hye as Lieutenant Cho.

We also have amazing actors like Uhm Tae Goo and Kim Joo Hun as guest actors. Among other seemingly minor yet important characters are: Moon Seung Keun as Dr. Myung and Jo Bok Rae as Sergeant Park. I am particularly held back by Seung Keun ahjussi's acting in last 2 episodes. His pronunciations and dialogue delivery made my eyes to bawl out.

Kim Jee Woon PDnim is a very familiar face when it comes to Korean movies and he's proved his worth long back. However, Dr. Brain is his directorial debut in Kdramas and this is the fact that made me doubt about the results. But to my surprise and utter satisfaction, he has done so so so well that I can't help but applaud for him. If you see the storyline is almost like a movie's but still 6 hours is too long for making a movie. And he's successfully proved his experience despite that.

Cinematography is an aspect that's been taken care of very well. The camera movements as well as capture angles perfectly showcase the scenarios involving the puzzles put forth by the entanglement of various sets of memories inside Koh Se Won's brain, his interaction with multiple consciousnesses and his visions. The CGI is also very nice for the hallucinations, imaginations and dreams that Sewon was having as side effects. The sound production too is perfectly done to suit the moods and vibes of the drama.

Scripts involving brain and neuroscience is nothing new for Kdramas and moreover this is fiction. The theories of brain sync, put forth here doesn't make sense at all, at least for the year 2021 but the execution is so very good that it almost feels real, even to biologists like me, haha. I guess that's the magic of science fictions. Who knows these theories might become possible after a century or two.

Despite the mixed feelings, I honestly wanted the drama to do well. And for a matter of fact, my biggest fear was how the entire world is now immensely interested in investing in Kdramas. It's some sort of insecurity that I have developed recently which make me afraid about the originality of Kdramas, which is slowly becoming diluted by mediocre Netflix series. But Dr. Brain has come to my rescue as a beam of hope and I wish it continues to prosper and burn even brighter in the future.

Overally, Dr. Brain is thrilling, enraging, captivating and intriguing at the same time and in my opinion, it is a must watch. Please please please don't pass it down thinking it's apple+ debut in Korea. It's an amazing show as it is.