Season 1
20 episodes · first aired 2016-11-16
| Still | # | Title | Overview | Air date | Rating |
|---|---|---|---|---|---|
 | 01 | Episode 1 2016-11-16 | In 1958, the nobleman Dam-Ryung releases a mermaid back into the ocean. In present-day Seoul, the figure of conman Joon-Jae stands on the same spot. | 2016-11-16 | 7.7 |
 | 02 | Episode 2 2016-11-17 | Joon-Jae brings a beautiful woman back to his hotel, unaware that she's a mermaid. Jin-Ok realizes she's been scammed and sends men after Joon-Jae. | 2016-11-17 | 6.8 |
 | 03 | Episode 3 2016-11-23 | With no memory, Joon-Jae finds himself alone on a beach next to a jade bracelet and a single pearl. Meanwhile, the mermaid crosses the ocean to Seoul. | 2016-11-23 | 9.8 |
 | 04 | Episode 4 2016-11-24 | At the aquarium, Joon-Jae runs into a woman being chased by security. Feeling a sense of déjà vu, Joon-Jae rescues her and brings her home. | 2016-11-24 | 10.0 |
 | 05 | Episode 5 2016-11-30 | Joon-Jae lives with the woman who he names Sim Chung. Fugitive Dae-Young has been on the run for 3 months when a murder occurs near Joon-Jae's house. | 2016-11-30 | 10.0 |
 | 06 | Episode 6 2016-12-01 | Sim Chung is involved in a traffic accident. Joon-Jae rushes to the hospital to find her in critical condition. | 2016-12-01 | 10.0 |
 | 07 | Episode 7 2016-12-07 | Joon-Jae tells Sim Chung he loves her. Meanwhile, detective Hong comes across Dae-Young while investigating a murder. | 2016-12-07 | 10.0 |
 | 08 | Episode 8 2016-12-08 | Jung-Hoon teaches Sim Chung that jealousy is the way to a man's heart. Meanwhile, Joon-Jae sees an image of a man with a mermaid on an ancient vase. | 2016-12-08 | 10.0 |
 | 09 | Episode 9 2016-12-14 | Joon-Jae finally faces off with his pursuer Dae-Young. He suffers a major injury and confesses his feelings to Sim Chung before losing consciousness. | 2016-12-14 | 10.0 |
 | 10 | Episode 10 2016-12-15 | In a museum, Joon-Jae sees a figure in a painting that looks just like him. Unable to identify the figure as Dam-Ryung, he grows distraught. | 2016-12-15 | 10.0 |
 | 11 | Episode 11 2016-12-21 | Sim Chung leaves the house after learning Joon-Jae is a conman. In a panic, Joon-Jae desperately searches for her. | 2016-12-21 | 10.0 |
 | 12 | Episode 12 2016-12-22 | Joon-Jae is arrested by detective Hong. When Sim Chung realizes they are in danger, she tracks them down. | 2016-12-22 | 10.0 |
 | 13 | Episode 13 2016-12-28 | Joon-Jae is still having strange dreams. Sim Chung hears Joon-Jae say the name Se-Hwa in his sleep. She asks him who he is talking about. | 2016-12-28 | 10.0 |
 | 14 | Episode 14 2017-01-04 | With Professor Jin's help, Joon-Jae learns he is an ancestor of Dam-Ryung. To avoid a tragic fate, he decides to protect Sim Chung whatever it takes. | 2017-01-04 | 5.5 |
 | 15 | Episode 15 2017-01-05 | Sim Chung's heart will stop without Joon-Jae's love. Upon learning this, Joon-Jae talks about his dreams and finding out that Sim Chung is a mermaid. | 2017-01-05 | 7.2 |
 | 16 | Episode 16 2017-01-11 | Joon-Jae and Yoo-Ran have an emotional reunion at Sim Chung's birthday party. Joon-Jae learns why Dae-Young has been chasing him. | 2017-01-11 | 10.0 |
 | 17 | Episode 17 2017-01-12 | After almost being caught by Dae-Young, Sim Chung erases his memory. In the process, she witnesses the final moments of Dam-Ryung and Se-Hwa. | 2017-01-12 | 8.5 |
 | 18 | Episode 18 2017-01-18 | After Il-Joong's death, detective Hong gets a warrant to search Seo-Hee for evidence. Meanwhile, Chi-Hyun threatens Nam-Doo to get him to cooperate. | 2017-01-18 | 10.0 |
 | 19 | Episode 19 2017-01-19 | Chi-Hyun points a gun at Joon-Jae, but Sim Chung jumps in front and is shot. She slips into a coma, causing Joon-Jae to fall into despair. | 2017-01-19 | 10.0 |
 | 20 | Final 2017-01-25 | Sim Chung erases Joon-Jae's memory and returns to the ocean. When Joon-Jae wakes up, there's only a single pearl next to him. Three years pass... | 2017-01-25 | 10.0 |
Ratings shown are community scores. Once OMDB is wired, these become per-episode IMDB values.