Mystery 6 Episode 4

Despite everything, Donghae becomes more and more depressed and isolated from the other members. He takes a moment alone and calls his mom. Leeteuk, Eunhyuk and Shindong take Donghae to a hypnosis therapy session, and the hypnotist puts him into a trance. Donghae writes down what the ghost is saying to him, the members try to interpret the scribbled words. The mother of Park Gayoung is tracked and she tells how her husband had killed Gayoung and himself in a drunken rage. She also revealed that a boy who lived there before Park Ga Young moved in had also died under mysterious circumstances, while in the Philippines. He had been smoking and found out his girlfriend liked someone else. He took her with him on his bike and got into an accident only killing his girlfriend. Super Junior travel to Thailand for a concert. That evening while relaxing by the pool, Leeteuk and Eunhyuk see Donghae drowning in the water. (Source: Wikipedia)