as Captain Ri Jeong-hyeok,
Son Ye-jin as Yoon Se-ri,
Seo Ji-hye as Seo Dan, and
Kim Jung-hyun as Gu Seung-jun.|alt=Hyun Bin, Son Ye-jin, Seo Ji-hye and Kim Jung-hyun at Crash Landing on You press conference.
Main •
Hyun Bin as Ri Jeong-hyeok: : A Captain in the
Korean People's Army (KPA) serving in the
Korean Demilitarized Zone (DMZ) and the captain of Company Five. He is the youngest son of the Director of the
General Political Bureau of the KPA. Jeong-hyeok is described as having a
South Korean-style
tsundere personality: cold, principled, and uncompromising on the outside, yet endearing and occasionally "adorable" on the inside. His life is upended when Yoon Se-ri, a South Korean
chaebol heiress, accidentally
paraglides into
North Korean territory. Although regulations require her execution, he chooses to hide and protect her. Before his military service, Jeong-hyeok was a talented pianist studying in
Switzerland. During his time there, he briefly crossed paths with Se-ri, though they did not formally meet. Following the mysterious death of his older brother, he was forced to give up his musical career, return to North Korea to enlist, and investigate the incident. •
Son Ye-jin as Yoon Se-ri: : A third-generation South Korean heiress and the illegitimate daughter of Yoon Jeung-pyeong, the chairman of Queens Group. Depicted as a high-profile celebrity known for her beauty and business acumen, she established a successful fashion brand and was named successor to her father's conglomerate. While paragliding, a tornado sweeps her across the border into North Korea, where she encounters Captain Ri Jeong-hyeok. Initially a steely pragmatist who prioritizes her career over emotion and remains undaunted by threats, As she grows closer to Jeong-hyeok, she desires his happiness. •
Kim Jung-hyun as Gu Seung-jun: : A
British-Korean businessman and former fiancé of Se-ri. Depicted as being charming and persuasive but unscrupulous, he
embezzles a massive sum from Se-ri's brother, Yoon Se-hyeong. To evade the
National Police Agency and
Interpol, he flees to North Korea, intending to hide for ten years until the statute of limitations expires. In
Pyongyang, he develops a romantic interest to Seo Dan, though she initially rejects him due to her engagement to Jeong-hyeok. •
Seo Ji-hye as Seo Dan: : A cellist from an upper-class background in Pyongyang and Jeong-hyeok's fiancée. Characterized as a strong, confident, and elegant woman, she fully expected to marry Jeong-hyeok until the appearance of Se-ri forced her into a complicated
love triangle. She is initially devoted to Jeong-hyeok and rejects Seung-jun's advances. She eventually opens her heart to Seung-jun after spending time with him and receiving his earnest advice.
Supporting North Korean soldiers in Company Five •
Yang Kyung-won as Pyo Chi-su: A sergeant-major in Company Five. Despite his short temper and hostility toward Se-ri due to his prejudices against South Korea, he is kind-hearted and loyal. •
Lee Shin-young as Park Kwang-beom: A staff sergeant noted for his good looks and quiet demeanor. He is respectful of and loyal to Jeong-hyeok. His knowledge of
South Korean dramas allows him to bridge the
cultural gap by translating Se-ri's slang for his comrades. •
Tang Jun-sang as Geum Eun-dong: The youngest member of the unit. He is the sole breadwinner for his family and bonds closely with Se-ri. With nine years of military service remaining, he frequently expresses longing for his mother. A former
kotjebi, he rose through the ranks through bribery and corruption. Cheol-gang orchestrates criminal operations including drug trafficking, illegal excavation in the DMZ, and harboring fugitives. He murders those who threaten to expose him, including Jeong-hyeok's brother. •
Kim Young-min as Jung Man-bok: A
wiretapper assigned to monitor Jeong-hyeok, known by the moniker
gwittaegi (). Coerced into working for Cheol-gang to protect his family, he previously provided the intelligence that led to the death of Ri Mu-hyeok, Jeong-hyeok's brother and Man-bok's former benefactor. Burdened by guilt, he ultimately allies with Jeong-hyeok and Se-ri to bring down Cheol-gang.
People around Ri Jeong-hyeok • Jun Gook-hwan as Ri Chung-ryeol: Jeong-hyeok's father and the Director of the General Political Bureau. A vice-marshal, he is a calculating figure known in the military as the "Old Fox" (). •
Jung Ae-ri as Kim Yun-hui: Jeong-hyeok's composed mother who generally defers to her husband, except regarding matters involving her children. •
Bang Eun-jin as Han Jeong-yeon: Se-ri's stepmother. Their relationship is strained by an incident where Jeong-yeon, embittered by her husband's infidelity, abandoned a young Se-ri at a beach, leaving lasting emotional scars. •
Hwang Woo-seul-hye as Do Hye-ji: Se-jun's wife and a former actress. She married Se-jun for his wealth and maneuvers to secure his succession as chairman. Upon learning of her survival in North Korea, he actively hinders her return to preserve his claim to the family fortune. •
Yoon Ji-min as Go Sang-ah: Se-hyeong's ambitious wife who covets Se-ri's company. She conspires to keep Se-ri trapped in the North. •
Ko Kyu-pil as Hong Chang-sik: Se-ri's anxious team manager who, along with Su-chan, tirelessly searches for her. •
Park Myung-hoon as Ko Myeong-seok: Seo Dan's uncle and a Major General in the Ministry of State Security. He secretly supports Jeong-hyeok and is frequently embarrassed by his sister's theatrical behavior. •
Kim Jung-nan as Ma Young-ae: The Senior Colonel's wife and the influential leader of the village women. Se-ri quickly wins her favor through flattery. •
Cha Chung-hwa as Yang Ok-geum: A hairdresser and former news announcer. She is Wol-suk's close friend.
Special appearances List of actors and characters who made special appearances and were acknowledged in the closing credits: •
Jung Kyung-ho as Cha Sang-woo: A Hallyu star and Se-ri's former secret boyfriend (episodes 1, 5, 7). •
Ha Seok-jin as Ri Mu-hyeok (episodes 2, 3, 8, 10): Jeong-hyeok's late brother. He was murdered by Cheol-gang disguised as an accident after uncovering the latter's corruption. •
Na Young-hee as a North Korean wedding dress shop owner (episode 7). •
Kim Soo-hyun as Won Ryu-hwan / Bang Dong-gu (episode 10): A North Korean sleeper agent in Seoul. He reprises his role from the 2013 film
Secretly, Greatly. •
Kim Sook as a North Korean fortune teller (episodes 11, 16). •
Choi Ji-woo as herself (episode 13). == Episodes ==