I understand you're asking about "Running Man" with a specific date, July 8, 2012. Running Man is a popular South Korean variety show that airs weekly. Without being able to verify the exact episode content, I can say that on this date in 2012, they would have filmed and aired an episode that week. The specific challenges and guests for that particular episode aren't coming up in my searches. If you're looking for details on a specific challenge or guest from that episode, you may want to check online fan sites or the show's official website for more accurate information about that exact date's episode.