Under the Skin

Zhang Jing Yi is the FL in both. The chemistry is natural. The relationship had depth. However, BEITD does not have a satisfactory ending.

Under The Skin is also a cop show with a supernatural-esque vibe, and while there is no BL, the relationship between the ML's is really great.

Similarities:
- Jin Shi Jia is the main in both drama
- Genius ML
- Many murder cases to solve leading to the big underlying cases from the past
- Great investigation/detective drama + thrilling

If you like Under the Skin (season 1), you might like The Truth Within. Both feature leads who transfer departments and use advances in forensic technology to solve cases they have been personally haunted with. Mystery, crime investigation, detective police work, mental health, complex intricate cases.

- Both had interesting synergy between two male leads. Same enemies to bromance troupe.They first hated each other, but later on become close buddy.
- Both had same theme : Mystery,Crime,Investigation, Thriller

To be honest, I am not really sure why both dramas seem to give similar vibes. One deals with a genius artist joining the police (and has strong bromance), the other deals with someone who doesn't even like most of the police (and there definitely is no actual bromance). UtS spends a lot of time on separate cases, while TE seems to concentrate on a long-running over-arching plot.

And yet, there's just something really similar in the atmosphere they both project - like a dream state where things are what they seem to be but at the same time, very much different. If you've watched UtS (and watching TE), you might "get" what I mean.

Also, both have good soundtracks. At least that's an obvious common thing.

ETA Ah, there it is, the thing that made me feel there's a similarity (eventual reveal in ep 9). Both of these dramas aren't afraid to touch on VERY sensitive topics for mainland audiences. UtS did it more openly, but the police were capable there and no corruption in sight. TE decided to make it darker and not hide the rot under the pretty surface.

Under the skin is the first season.
Both of the drama has the same actors and actresses. Both main leads are present and the supporting cast is also present.

Under the Skin and Medical Examiner Dr. Qin are crime dramas with a ML who is a specialist in their field. The main characters of both share some nice bromance and friendship throughout their case solving.

Both dramas owe their existence to the works of Arthur Conan Doyle, although with Miss Sherlock it's more obvious.
Both feature an investigation pair with one partner being a genius and the other coming along for the ride to keep the genius safe and grounded.
Both dramas leave you with a craving for a second season.

Both dramas are crime mystery dramas
Both dramas contain multiple case solving plot with an over arching storyline
Both dramas are heavily friendship focused and focus on found family and team bonding
How can I forget... Bromance!!!
Both dramas are focused on a specialized element in the crime department. In under the skin it's forensic sketching and in unnatural Fire it's fire investigation

Both show are detective dramas to criminal cases with friendship and partnership for the leads
Both have unique angle to criminal cases

Both are detective dramas solving criminal cases with psychological aspect for it
both have good partnership between the male leads

Both dramas are detective dramas solving criminal cases
Both dramas have good partnership between older detective and younger profiler

Both have 2 smart & strong leads working together to solve cases…Their chemistry/bond are undeniable.
- One ML is a professor & The other ML is a police officer
- The main difference is that Guardian is fantasy/sci-fi

Both dramas are detective dramas
Both dramas have older detective and younger partner solving criminal cases