Actor Lee Jong Suk's charms swept this past weekend's episode of SBS entertainment program "I like Sundays - Running Man." He showed off a strong chemistry with Song Ji Hyo, with her boyfriend Gaeri aside.

On the episode of "Running Man" which aired on January 19, 2014, actor Lee Jong Suk and actress Song Ji Hyo acted out as the secret couple of the day. The two carried on missions such as holding arms, holding hands, and kissing on the forehead without letting the other Running Man members and guests know, and showed off their romantic sides. Although this was a mission, Lee Jong Suk and Song Ji Hyo's affectionate scenes made the audiences' hearts palpitate.

The chemistry of the secret couple was acknowledged even by the Running Man members and guests. Kim Jong Gook said, "I thought Lee Jong Suk actually liked Song Ji Hyo." Even Gaeri said, "I thought the two were going out because they were holding hands in the fimling scenes."

The Running Man members and guests are to execute one secret mission for each game. According to the results of the mission, the two members who succeeded in the secret mission can provide a fake hint to the Running Man members, and when the two members fail the secret mission, the other Running Man members and guests receive one real hint from the Running Man production team.