"Running Man" 101017 refers to Episode 15 of the South Korean variety show Running Man, which aired on October 17, 2010 on SBS.

Here are the details for that episode:

• Episode Number: 15
• Air Date: October 17, 2010Theme:** "The 1st Running Man Song Festival" (also known as the "Running Man Music Festival")
• Guest(s): Kim Je-dong and Shin Bong-sun
• Location: Seoul (including a rooftop venue and a recording studio)

Episode Summary: This is one of the most iconic early episodes of Running Man. The mission was for the cast and guests to create and record a theme song for the show. The members were divided into teams to write lyrics and compose music, and they had to perform the songs in front of a panel of judges (including music professionals).

The episode is famous for:

• Kim Je-dong's energetic and chaotic hosting/participation.
• Shin Bong-sun's unique and unpredictable charm.
• The birth of the song "I Like This Song" (which became a beloved Running Man anthem).
• The members' creative (and often hilarious) attempts at songwriting and singing.
• The final recording session where the cast had to sing their hearts out.

It is widely remembered as one of the funniest and most memorable episodes from the show's first year.