Watch Mouse S01e20 210519 720p-next 1 Today

In a moving final sequence, a dying Ba-reum has a vision of himself as a young boy (Jae-hoon) in a church. He tells his younger self that he is "no longer a monster," finally finding a small measure of spiritual peace before passing away. Legacy of the "Mouse" Experiment

The episode also resolves the fates of the supporting cast and the societal impact of the OZ organization's actions: Watch Mouse S01E20 210519 720p-NEXT 1

In a twist of poetic justice, the very brain surgery intended to save Ba-reum's life becomes his greatest torment. By transplanting parts of the empathetic Sung Yo-han's brain into his own, Ba-reum is forced to feel the visceral pain and guilt of his previous murders. In a moving final sequence, a dying Ba-reum

Ba-reum chooses to enact justice on his own terms by killing his father, Han Seo-joon, in prison—fulfilling Detective Go Moo-chi's long-standing wish for revenge. Redemption and Death By transplanting parts of the empathetic Sung Yo-han's

The finale centers on Ba-reum's desperate quest for atonement, even as he knows he can never truly be forgiven by his victims' families.

He eventually visits Ba-reum’s unmarked grave, suggesting a complex form of closure and a sliver of forgiveness for the man who was both his partner and his enemy.