Finally, the wait is over as the much-anticipated drama "Undercover" will officially debut today, April 23.

After almost a year of teasing fans with intriguing updates, viewers can now witness the turn of events in JTBC's newest crime thrilling drama featuring Kim Hyun Joo, Ji Jin Hee, Yeon Woo Jin, and Han Sun Hwa.

Directed by Song Hyun Wook, "Undercover" is a Korean remake of the popular BBC One television series of the same name, starring Sophie Okonedo and Adrian Lester.

It follows the life of the National Security Planning agent Han Jung Hyun, played by Ji Jin Hee, and his mission to keep his identity a secret. Interestingly, things got caught up when he fell head over heels with Choi Yeon Soo, portrayed by Kim Hyun Joo, who is a human rights lawyer.

The challenging part occurred when his wife was appointed as the head of the Senior Civil Servant Corruption Investigations Unit.

With a bit of information on the newest evening drama, here are the key points you need to know before watching "Undercover" episode 1.

READ MORE: JTBC's 'Undercover' Starring Ji Jin Hee & Kim Hyun Joo Unveils First Teaser

Kim Hyun Joo and Ji Jin Hee Reunite After Five Years

In July 2020, the broadcasting network confirmed the reunion between the 43-year-old actress and her "I Have a Lover" co-star, where they portray the roles of Do Hae Gang and Choi Jin Eon.

In a previous interview cited by an outlet, the "Misty" actor revealed why he took the role of Han Jung Hyun.

He shared that he was touched by his character "who sacrifices himself to protect his loved ones," adding that he is also "looking forward" to work again with Kim Hyun Joo.

Given that the lead stars' chemistry are already tried and tested, this will surely make the forthcoming drama a sure hit.

Intriguing Teaser Poster

Ahead of the "Undercover" premiere, JTBC dropped a fascinating teaser poster that piqued the viewer's interest.

It is far different from other official posters as it hints at the possible dispute between the lead stars.

The teaser featured Han Jung Hyun and Choi Yeon Soo at the center but was separated by ripped pieces that illustrate an unexpected threat that would rock their once happy marriage.

Beside them are Han Sun Hwa and Yeon Woo Jin, who will portray as the young Han Jung Hyun and Choi Yeon Soo.

Thought-Provoking Stills

Since the start of April, JTBC continues to release "Undercover" teasers showing captivating yet puzzling stills.

The broadcasting network recently dropped a new still showing Ji Jin Hee and Lee Jae In, who plays Jung Hyun & Yeon Soo's daughter. The latest teaser depicts the patriarch as a doting father as he placed his arms around her daughter's shoulder.

A day before the debut, the lead actor hints about his mysterious past, saying, "I had to hide it to protect it."

On the other hand, JTBC released their first teaser showing Jung Hyun & Yeon Soo's happy family until they discover each other's dark past.

IN CASE YOU MISSED: Kim Hyun Joo, Ji Jin Hee, and More From Stellar Cast Are All Set for JTBC's "Undercover"

KDramastars owns this article.

Written by Geca Wills