Mr. Plankton () is a 2024 South Korean romantic comedy television series written by Jo Yong, directed by Hong Jong-chan, and starring Woo Do-hwan, Lee Yoo-mi, Oh Jung-se, and Kim Hae-sook. The series tells the story of Hae-jo, a man who was the result of an error in artificial insemination, as he forces Jae-mi to accompany him on his last journey after learning he is terminally ill. It was released on Netflix on November 8, 2024.

Synopsis Mr. Plankton is a romantic comedy about a woman, Jae-mi, as she is forced by Hae-jo, a man who was the product of an incorrect artificial insemination, to accompany him on his last journey in life after learning he is terminally ill. Jae-mi also learns she has a medical problem, which is devastating to her.

Cast and characters Main Woo Do-hwan as Hae Jo/Chae Seung-hyeok A terminally ill man who was born from a mistake. Lee Yoo-mi as Jo Jae-mi A 28-year-old woman who has premature menopause. Oh Jung-se as Eo Heung The only son of the 500-year-old, ancient Eo clan's main family and Jae-mi's fiancé. Kim Hae-sook as Bum Ho-ja Eo Heung's mother and the daughter-in-law of the Eo clan's main family for 60 years.

Supporting Kim Min-seok as Yoo Ki-ho/Kkari Hae jo's colleague Lee El as Bong suk/Ju Ri Hae Jo's childhood friend Oh Dae-hwan as Wang Chil-seong Leader of the Prince Gang, a crime gang. Lee Hae Young as Chae Yeong-jo Hae Jo's father Alex Landi as John Na Kim Soo-jin as Park Gal-ja Ahn Suk-hwan as O Man-soo Owner of a sundae shop and the first candidate for Hae-jo's biological father. Jo Han-chul as Ko Jae-geun the second candidate for Hae-jo's biological father. Kim Jung-ho as Shin Myeong-su Pharmaceutical company boss and the third candidate for Hae-Jo's biological father.

Others Nam Mi-jung as hospital lobby mom

Production Development The series, which consists of ten episodes, was directed by Hong Jong-chan, who previously directed Juvenile Justice (2022) and written by Jo-young, who previously wrote It's Okay to Not Be Okay (2020). It is produced by Base Story and HighZium Studio.

Casting On July 12, 2023, Netflix revealed the casting of Woo Do-hwan, Lee Yoo-mi, Oh Jung-se, and Kim Hae-sook.

Release Mr. Plankton was released on Netflix on November 8, 2024, with all its ten episodes.

Reception Critical response

Controversy On October 16, 2023, the production company of the series told Newsen about a netizen's claim that the filming crew illegally dumped trash after filming on Jeju Island. The production company stated, "We filmed from the morning to the afternoon on October 15 at Hwasun Golden Sand Beach. Since filming ended after sunset, we had planned to clean up over two days, that day and the next morning. After checking, we found that the production team was even more careful and finished cleaning this morning. We will be even more careful during filming in the future."

Listicles + Name of publisher, year listed, name of listicle, and placement Publisher Year Listicle Placement Time Magazine 2024 The 10 Best K-Dramas of 2024

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