In You Who Came From the Stars, episode 13, Lee Hwi Kyung(played by Park Hae Jin) started to get suspicious of Lee Jae Kyung(played by Shin Sung Rok). Previously, Cheon Song Yi(played by Jun Ji Hyun) told Hwi Kyung that Jae Kyung was the man who Han Yoo Ra(played by Yoo In Young) dated right before her death. Later, Hwi Kyung checked that Jae Kyung went inside home, went up to his secretary and said, “I left something in Jae Kyung’s car a few days ago. Could you hand me his keys? I’ll be right back.” The secretary gave him the keys and Hwi Kyung went to his car to look through his GPS. He went through the latest addresses Jae Kyung has searched for and found an address of a mental hospital.