Running Man S01 E670 A Midsummer Night's Detective, Part 2

"Don't Walk, Run!"

The eight great detectives get given two new cases revolving around two mysterious murders. After splitting up into two groups, they face each other in a quest to find the suspects. Which odd pairing will have what it takes to look for evidence, find clues, and earn hints as they battle their fears in a gruesomely horror-filled theme?