Legend of the blue sea episode 8
The Legend Of The Blue Sea episode 8 will feature new challenges for Heo Joon-jae.Twitter/SBSNOW

The Legend Of The Blue Sea returns with another interesting episode this Thursday, December 8, at 10pm KST on SBS. Episode 8 will feature Heo Joon jae's struggles to win back Shim Chung, and Kim Dam-ryeong's rescue mission to save Se-hwa.

Episode 7 of the Korean mini-series ended with two interesting twists that could change the lives of the lead characters. While the flashback sequence hinted at the demise of the golden-tailed mermaid, the Seoul sequence teased the betrayal of Jo Nam-doo.

The senior conman was secretly running an investigation on the silver-tailed mermaid ever since she miraculously recovered from her leg injury. He consulted experts to confirm his doubts about her superpowers and realised that she is not an ordinary human being.

The team up between Lee Hee-joon's character and the junior university researcher Cha Si-ah could be dangerous for Jun Ji-hyun's character. The trailer shows her financially helping him out with a pearl, which he takes to a vendor for checking its quality. Will he betray her and reveal her real identity to the world?

Click here to watch Legend Of The Blue Sea online via live streaming tonight at 10 pm Korean Time on SBS. Episode 8 will also be available online here for the followers of the period drama world-wide.

Meanwhile, the sneak peek video features a conversation between the female lead and her friend, Yoo Jeong Hoon. While they walk along the seashore, he suddenly holds his chest tightly and says something to her. Since it was already revealed that a mermaid cannot survive on land for long, it remains to be seen if the upcoming episode will mark the end of Jo Jung-suk's role as a mermaid.

The promo also focuses on a sequence between Heo Joon-jae and serial killer Ma Dae-young. After receiving a mysterious message, the male lead goes out alone to a parking lot and the next scene shows Sung Dong-il's character. Will he kill the conman for Kang Seo-hee? Watch the trailer below: