"Byeon Woo-seok Effect" worked out. According to Nielsen Korea, SBS entertainment program "Running Man," which aired on the 12th, had a national viewership of 4.0 percent. It increased by 0.8 percentage point from 3.2 percent last week. Based on the Seoul metropolitan area, viewership is 4.4 percent, and the highest viewership per minute is 6.3 percent.

Actor Byeon Woo-seok, who is receiving great love through the popular drama "Lovely Runner" appeared on the show, drawing attention. Byeon appeared on "Running Man" for the first time in two years and caught attention by wearing his drama character Sunjae's school uniform. 

The members expressed their expectations for Byeon. Yoo Jae-suk was happy, saying, "It's good too see Byeon gaining so much popularity." When Haha met Byeon, he said, "I will give you a piggy back," drawing laughter. In particular, Haha took selfies sitting next to Byeon and took friendly care of him throughout the show, and was booed by the members.

Other members were also impressed by Byeon's good looking face. Looking at the back, Yoo Jae-seok said, "You're handsome just by looking at the back of your head," and added, "I can see you worked hard" to Ji Seok-jin's back of his head.

Meanwhile, Byeon performed in the same team as Haha and Yoo Jae-suk at the final mission site, and based on the last hint, Byeon carried Yoo Jae-suk across the finish line and won the game. Byeon Woo-seok expressed his gratitude, saying, "I came here after two years and had fun."

<Translated by=Meenyoung Lee>