It is the first SF space drama to be attempted in Korea.
Adapted from 2014 short movie "The sea of tranquilty" also by director Choi Hang-Yong
The English title, The Silent Sea, is different from Sea of Tranquility , the name of the actual calm sea where Neil Armstrong and Buzz Aldrin flew to the moon on Apollo 11.
Hep Sung-Tae (Kim Jae-Sun) & Gong Yoo (Han Yoon-Jae) played in "Squid Game") although they shared no scenes.
SAA stands for "South Korean Space and Aeronautics Administration"