This week's episode of 'Infinity Challenge' saw the results of the "So Ji Sub Effect" as it managed to clinch the #1 spot as the most viewed show of the night. According to AGB-Nelson Media Research on July 31st, the viewership percentage for this week's episode of 'Infinity Challenge' was 16.1%, which was 1.7% higher than last week's broadcast. The primary factor of the increased TV ratings was most likely So Ji Sub; an actor who is very rarely seen in the variety show industry. Viewers had an enjoyable time watching the Hallyu star interacting well with the cast members and were surprised by his unexpectedly good variety show skills. Other shows that were broadcast in the same time slot include: SBS's 'Star King' and KBS 2TV's 'Declaration of Freedom Saturday', which received viewer ratings of 8.5% and 6.2% respectively. On this week's Summer Special episode, So Ji Sub and the cast of 'Infinity Challenge' headed to a public swimming pool where they competed against each other in various water games. Source: Seoul Newspaper NTN