When you're in a "couple" for years, you tend to know some intimate things about the other person! Gary
confessed that his 'Monday Couple' counterpart, Song Ji Hyo
, was perhaps the best person alive who could see through his lies - more than his own mother.
Trying to convince the rest of the cast that he wasn't guilty of being a part of the 'mafia' in the latest episode of 'Running Man', he said, "Let's pick Ji Hyo, first of all".
However, Song Ji Hyo fired back, "Gary keeps protecting Lee Sang Hwa. If you think about it, he might be the mafia, too."
SEE ALSO: Song Ji Hyo shares some helpful beauty tips on 'Beauty View'
Gary conceded, saying, "Ji Hyo is the best in the world when it comes to detecting my lies. She's better than my mother."
Are you curious about what eventually happened to Gary? Watch the full episode here!