Don't miss it if you're a sci-fi fan!
It's exciting for Thriller fans; it made me hold my pee to end the episode!

Love the story!
The story moves at the perfect pace, not too fast or too slow, introducing you to the characters, technology, and world of this drama. It all started in ML's lab, where he was transferring memory from one mouse to another. The experiment then abruptly shifted to a human trial brain copy paste process. From there, the story progresses to include more characters, more plot, a criminal investigation, and finally, his own family mystery. It's a perfect package for the thriller genre.

Love the idea!
In terms of science fiction, it is a far-fetched technology concept at the moment. It is possible, but not likely in the near future. However, the show introduces technology in a believable slow burn mode. Begin with a mouse trial, then move on to a human trial, where only a sliver of memory was transferred.

Love the casting!
I've had mixed feelings about veteran actor Lee Sun Kyun, but I like his performance in this role; in all dramas, he plays the same flat character, but for this role, he's perfect! Lee Yoo Yung is an excellent choice for the role of Mom, and some of the scarier scenes are convincing. Kudos to all of the supporting actors. The female cop is the most inexperienced actor in the cast, but she is still bearable.