Sign (2011)

Kim Eun Hee wrote both Sign and Harvest Villa.

Same writer and same director. Both begins with a celebrity dying and the main character trying to reveal the truth behind it. Pretty much give the same feeling. Both worth watching.

Both set up in NFS,
Both have male leads as Medical examiners,
Both male leads have bad personality and do not socialise,
They often go against their superiors,
They help prosecution solve unsolvable crimes,
Both have FL starting as a rookie(ME in Sign, prosecutor in investigation couple).

Medical dramas of idealist doctors fighting the corrupt systems without loosing their souls. Doctors & teams trying to serve-help the public while battling corrupt, power hungry people and systems prevalent in the medical field.

Kim Eun Hee is the genius writer who wrote Signal and she is also the one who wrote Sign. Sign is also one of the best crime thriller dramas out there. If you are looking for something as good as Signal then you should definitely watch Sign and vice versa. Both dramas are blessed with excellent unforgettable plot, perfectly written characters and TOP actors. Sign has Park Shin Yang as the main lead and he is one of the best top notch actors. Both dramas gained high TV ratings and a must watch dramas.