The Silent Sea cast (2021) led by Gong Yoo as Captain Han, Bae Doona as Dr. Song, and Lee Joon as Ryu, who embark on a high-stakes mission to the moon to retrieve a mysterious sample.
Table of Contents
Introduction

The Silent Sea (2021) is a thrilling South Korean science fiction series set in a dystopian future where Earth is facing environmental collapse. The show follows a team of astronauts, led by Captain Han (played by Gong Yoo) and Dr. Song (played by Bae Doona), on a perilous mission to the moon. Their goal is to retrieve a mysterious sample from a research station, but as the mission unfolds, they encounter deadly secrets and hidden dangers that threaten not only their survival but the future of humanity. Combining intense suspense, emotional depth, and a futuristic setting, The Silent Sea captivates audiences with its gripping story and stellar performances.
The Silent Sea Cast
Gong Yoo as Captain Han (Han Yoon-jae)
Gong Yoo, known for his roles in Train to Busan and Goblin, stars as Captain Han Yoon-jae, the experienced and determined leader of the mission. Captain Han is tasked with leading a team of astronauts on a high-risk journey to retrieve a mysterious sample from the abandoned lunar research station. Throughout the series, Gong Yoo brings a deep emotional range to his role, capturing Captain Han’s struggle with the weight of responsibility and the dangerous secrets they encounter on the mission. His calm yet authoritative presence serves as a stabilizing force for the crew, adding a layer of intensity to the series.
Bae Doona as Dr. Song (Song Ji-an)
Bae Doona plays Dr. Song Ji-an, a brilliant scientist and one of the key members of the crew. Dr. Song is chosen for the mission because of her expertise in biochemistry and her deep knowledge of the mysterious incident that occurred at the lunar research base years earlier. Bae Doona, known for her roles in Kingdom and Cloud Atlas, portrays Dr. Song as a resourceful, determined, and emotionally complex character. Her performance highlights Dr. Song’s resilience and the internal conflicts she faces as she uncovers unsettling truths about the mission and the moon base.
Lee Joon as Ryu (Ryu Tae-seok)
Lee Joon plays Ryu, a former military man turned astronaut, who joins the mission with his own hidden agenda. Ryu is a complex character who is deeply affected by his past and has a more cynical view of the mission compared to the rest of the crew. As tensions rise on the mission, Lee Joon brings a sense of mystery and inner conflict to his role, as Ryu must confront his past actions and motivations. Lee Joon’s portrayal of Ryu adds layers of complexity to the show, making him a key figure in the team’s dynamic.
Kim Sun-young as Dr. Choi (Choi)
Kim Sun-young plays Dr. Choi, another key member of the mission team. She is a scientist who plays an important role in supporting Dr. Song throughout their lunar expedition. Kim Sun-young’s character adds depth to the scientific aspect of the mission, working alongside Dr. Song to understand the mystery behind the research station’s collapse. Her performance provides a balance of practicality and intelligence, ensuring the team remains grounded as they face the unknown dangers on the moon.
Lee Mu-yeol as Lieutenant Hong (Hong Ga-young)
Lee Mu-yeol portrays Lieutenant Hong, a supportive and skilled astronaut who is tasked with helping the crew as they navigate through the mission’s challenges. Although Hong’s role is more subtle than the leads, his character’s contributions are essential, especially as the team encounters unexpected and life-threatening obstacles. Lee Mu-yeol’s portrayal is understated yet effective, adding to the tension of the series with his character’s unwavering loyalty and resourcefulness.
Jung Woo-sung as Chief of the Space Agency (Jung)
Jung Woo-sung plays the chief of the space agency overseeing the mission. Though his role is more peripheral, his presence adds an authoritative element to the story, providing a backdrop of political and organizational pressure that influences the mission. His character’s decisions and the agency’s involvement become more significant as the crew faces unexpected dangers on the moon.
Supporting Cast
1. Ha Ji-won as Park Yoon-jae
Ha Ji-won plays Park Yoon-jae, a supporting character who works as part of the mission team and has vital knowledge regarding the lunar research station’s past. Her character is intelligent and pragmatic, contributing significantly to the mission’s technical aspects. While her role isn’t as prominent as the main cast, her involvement becomes crucial as the plot develops, providing key insights that assist in the crew’s survival.
2. Kim Ye-eun as Young-hee
Kim Ye-eun portrays Young-hee, a supporting character who adds emotional depth to the narrative. She plays a scientist who is deeply affected by the dangers and losses that arise during the lunar mission. Her role is important in revealing the human side of the mission, reflecting the emotional toll on the crew members as they grapple with isolation and impending danger. Kim Ye-eun’s portrayal brings a sense of vulnerability to the series, adding tension to the crew’s situation.
3. Lee Chul-min as Bae Tae-sung
Lee Chul-min plays Bae Tae-sung, an astronaut who plays a supporting role on the team. Though he isn’t one of the primary characters, his contributions are necessary as the crew confronts the various challenges posed by their lunar mission. Lee Chul-min’s character adds a sense of professionalism and expertise, helping to maintain the team’s focus on the mission despite growing tension.
4. Jang Young-nam as Dr. Lim (Lim Ji-soo)
Jang Young-nam plays Dr. Lim Ji-soo, another scientist involved in the mission, contributing her research and technical expertise. Her role plays a critical part in unraveling the secrets behind the research station and the mysterious sample the crew seeks. Dr. Lim’s interactions with the lead characters further emphasize the tension surrounding the mission, making her a key piece in understanding the underlying mystery.
5. Kim Su-rok as Captain Jeon
Kim Su-rok plays Captain Jeon, a member of the team who provides leadership and guidance during their journey to the moon. While not one of the central characters, Captain Jeon’s role is crucial in keeping the team together during moments of crisis, offering a stabilizing presence. His performance adds a layer of reliability and strength, essential for the crew’s survival under extreme conditions.
6. Ahn Nae-sang as Mission Control Leader
Ahn Nae-sang plays the Mission Control Leader, a key figure overseeing the astronauts from Earth. His role is vital in guiding the crew through mission protocols and providing support from Earth, but as the story unfolds, it becomes evident that there are larger forces at play, complicating his relationship with the astronauts. Ahn Nae-sang’s portrayal brings an element of authority and tension, with his character’s decisions affecting the course of the mission.
Conclusion
In conclusion, The Silent Sea (2021) is a captivating blend of science fiction, thriller, and survival drama, driven by an exceptional cast that brings the intense, high-stakes mission to life. The main cast, including Gong Yoo, Bae Doona, and Lee Joon, deliver powerful performances, each contributing emotional depth and complexity to their characters. As they embark on a perilous journey to retrieve a mysterious sample from a lunar research station, the dynamics between the astronauts and their hidden motives create a gripping narrative.
The supporting cast adds layers of intrigue and tension, enriching the storyline with their expertise, personal struggles, and key roles in unraveling the mission’s deadly secrets. Together, the ensemble cast enhances the show’s chilling atmosphere and emotional depth, keeping viewers on the edge of their seats.
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(FAQs)
Who plays Captain Han in The Silent Sea?
Gong Yoo plays Captain Han Yoon-jae, the lead astronaut and mission commander. His character is calm, authoritative, and deeply committed to ensuring the crew’s survival while uncovering the secrets of the lunar research station.
What role does Bae Doona play in The Silent Sea?
Bae Doona plays Dr. Song Ji-an, a biochemist and the second-in-command on the mission. Dr. Song is selected for the mission due to her expertise in studying the mysterious sample from the lunar base. Bae Doona’s performance adds emotional depth to her character, as Dr. Song grapples with the dangers of the mission and her personal struggles.
Who is Lee Joon in The Silent Sea?
Lee Joon portrays Ryu Tae-seok, a former military astronaut with a mysterious past. Ryu’s complex motivations and internal conflict add tension and intrigue to the mission. As the crew faces perilous situations, Lee Joon’s portrayal of Ryu keeps audiences guessing about his true intentions.
What is the role of Kim Sun-young in the series?
Kim Sun-young plays Dr. Choi, one of the scientists aboard the mission. Dr. Choi contributes vital scientific knowledge and helps Dr. Song throughout the investigation into the lunar research base’s collapse. Kim Sun-young’s portrayal adds a grounded, practical presence to the team.
How does Lee Mu-yeol contribute to the storyline?
Lee Mu-yeol plays Lieutenant Hong Ga-young, an astronaut supporting the mission. Though his role is more subtle, his character provides stability and reliability for the crew during moments of crisis, helping ensure the mission stays on course.
Does The Silent Sea feature any well-known actors from other popular dramas?
Yes! Gong Yoo, Bae Doona, and Lee Joon are all established actors with a strong following. Gong Yoo is renowned for his roles in Goblin and Train to Busan, while Bae Doona is known for Kingdom and Cloud Atlas. Lee Joon gained recognition for his roles in My Father is Strange and Vagabond.
Who oversees the mission from Earth in The Silent Sea?
Ahn Nae-sang plays the Mission Control Leader, who is responsible for overseeing the astronauts and providing support during the mission. His role adds an authoritative element to the narrative, with his decisions significantly impacting the trajectory of the mission.
Is Gong Yoo’s character similar to his other roles?
While Gong Yoo is known for playing strong, protective characters in Goblin and Train to Busan, Captain Han in The Silent Sea is a more intense and isolated leader, carrying the weight of the mission’s life-or-death stakes. His role in The Silent Sea offers a more reserved, emotionally complex character compared to his previous roles.
What makes the chemistry between the main cast members stand out?
The chemistry between Gong Yoo, Bae Doona, and Lee Joon is one of the highlights of The Silent Sea. Their interactions are filled with tension, trust, and emotional vulnerability, which enhances the show’s suspense and character-driven drama. Each actor brings depth to their role, making the relationships between the crew members feel authentic and impactful.
How does the supporting cast contribute to the storyline?
The supporting cast, including Kim Sun-young, Lee Mu-yeol, and others, plays vital roles in keeping the story moving. Each supporting character adds a different perspective to the mission, whether through scientific expertise or emotional depth. Their contributions help uncover crucial details about the lunar base’s mystery and the dangers lurking on the moon.