On SBS's popular entertainment program "I Like Sundays - Running Man" which aired in the evening of Sunday, December 22, 2013, Gaeri got kidnapped and disappeared. The Running Man members took off to rescue Gaeri throughout the episode.

On this day's episode, which played out with the theme of "Nightmare of Christmas," Running Man members tried to find evidence of Gaeri's kidnapping and connect with the suspects. After tracking down the mysterious number that was left on Gaeri's cell phone, the members found out that the owner of the mysterious number was Gil of Ri Ssang. The members then took their individual journey to meet Gil.

When the Running Man members found Gil and asked him if there was anything that he knew about Gaeri's disappearance, Gil said he does not know anything about Gaeri, making the members confused even more.

Gil's "Saturday friends" You Jae Suk and Ha Ha then got angry at Gil for the "Sunday Friend" Gaeri, making the audiences laugh. In addition, the suspicious package that was delivered to Gil's name made Gil even more suspicious in the eyes of the Running Man members.