He is under great pressure from his father to become a doctor but he actually has no interest in the medical field at all. In order to keep himself awake and away from the troubles at hand, he takes drugs which led him to get into a fight with somebody. On the night of the murder, he swept the lab experiments off his desk in frustration. He wanted to commit suicide by jumping off the building but Wu Sai-hang convinced him not to and eventually he decided to pursue a course that he is interested in. Adrian Chau as Chau Yat-Hei, Oscar (周逸熙), a University marketing student and Ocean's older twin brother, who did IT business with Wu Sai-hang. Not many people can actually tell the difference between both twins, therefore, they often impersonate each other. He got into a car accident on the day of the murder but asked his brother to take up the blame because he didn't want to get demerit points. Daniel Chau as Ocean Chau, Oscar's younger twin brother. Unlike his brother, he is less intelligent, therefore already having a job even though they are the same age. He shows the more impulsive side of his brother when he got into a fight with Wu Sai-hang for breaking off a business deal. Before the car accident, he was cheating on Oscar with his girlfriend but his girlfriend didn't know that he had a twin. Sire Ma as Christy, Wu Sai-hung's fake girlfriend. She only pretended to take an interest in Wu Sai-hung because she and her boyfriend were on bad terms and she wanted to make her boyfriend jealous. However, Wu Sai-hung thought she genuinely loved him despite his controversies. Case 6 (Episode 17 - 20) Calvin Chan as Fong Sai-wing, Jay (方世榮), Fong Sai-yau's younger brother. He was killed by Alex and was buried by Alex and Bowie on an island. Ruco Chan as Fong Sai-yau, Jim (方世友), Jay's elder brother and Chung Hok-sum's boyfriend. He was angered by the fact that Jay died a painful death. This anger led to him being impulsive and he tried to set Bowie up in a trap by saying that he had claimed Jay's items. Bowie was worried that he would be traced back to the murder and indeed fell into the trap. However, as Jim couldn't prove that Bowie was the murderer, they got into a