Lee Seung Gi's drama "Mouse" has one more episode left before it bids farewell on primetime. But the newly released Episode 19 was jam-packed with revelations about the characters' identities.

After knowing that Jung Ba Reum (Lee Seung Gi) was the man behind the death of her grandmother, Oh Bong Yi (Park Ju Hyun) lost her trust for him, and even became cautious of meeting him.

Kyung Soo Jin is Park Du Seok's Missing Daughter

Meanwhile, Park Du Seok (Ahn Nae Sang) was alarmed after confirming that his wife Bang Yoo Hwa (Kim Hyo Jin) went missing again. All night, he had been looking for his wife, and fortunately, she was found by the police.

They took her home and Park Du Seok didn't expect that his wife had been carrying a baby all along.

They tried to look for the real mother of the child but weren't able to locate her. Park Du Seok's wife was involved in an accident while trying to escape with the baby.

It was later revealed that Park Du Seok and Bang Yoo Hwa were the real parents of Choi Hong Ju (Kyung Soo Jin).

Also Read: Lee Seung Gi and Lee Do Hyun Hailed as Most Buzzworthy Actors for First Week of May

Han Seo Joon's Real Son is Jung Ba Reum

Sung Ji Eun (Kim Jung Nan) went to visit her husband Han Seo Joon (Ahn Jae Wook) inside the precinct and begged to help her in saving Sung Yo Han's child (Kwon Hwa Woon). But she was surprised to know that Sung Yo Han was not their real son.

Han Seo Joon confessed that Jung Ba Reum was their real son. He intended to kill Sung Yo Han before to save Jung Ba Reum and proceed with the brain surgery.

It was then revealed in the flashback that Sung Ji Eun and the real mother of Sung Yo Han, switched babies years ago. Jung Ba Reum also confirmed it when he visited an orphanage and met Sung Yon Han's sister. Everything is making sense now for the police officer, he even went to visit his aunt (Kang Mal Geum) in Jeju to clarify things.

There he found out that she was a former member of an organization to investigate the OZ organization and her first case before was to monitor him. Jung Ba Reum later on discovered more truths about his past life and identity as Jung Hae Joon.

Go Mu Chi Starts to Connect All the Murders Happened before Jung Ba Reum

Now that he knew that Jung Ba Reum was the culprit behind Kang Duk Soo's death, Go Mu Chi (Lee Hee Joon) began to move on his own to find more clues about the OZ organization and to know if Jung Ba Reum was also involved there.

As he continued, Go Mu Chi started to think that Sung Yo Han was not the real psychopath, but Jung Ba Reum. Though he only knew that the police officer killed Kang Duk Soo, based on the evidence that he has, it is becoming more clear that Sung Yo Han is innocent.

IN CASE YOU MISSED IT: 'Mouse' Episode 18: Lee Seung Gi Admits Real Identity to Lee Hee Joon

What are you most looking forward to "Mouse" finale episode? Don't forget to share your thoughts with us in the comments!

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Written by Shai Collins