On the January 26 broadcast of the variety show "Running Man", comedian-actor Lee Kwang Soo visited the set of "You From The Stars".

With a real life chess concept that was suggested by a fan for this week's game, Lee Kwang Soo was looking around for his members and the other team's king. As he wandered around the SBS compound, he stumbled upon a door that had the sign "You From The Stars". When he entered the room, he looked like a child in a candy store while going through the prosecutor's office set.

Excitedly, he said, "I watch this drama a lot. Everyone, this is where they film the drama. I watch it so much the set feels like a second home to me." He went around the set and played with the props, even pretending to film his own scene in the drama.

While going around, he asked, "Does this mean Jun Ji Hyun's room is also somewhere here?"

He also shared that he and Kim Soo Hyun were close enough to speak informally to each other, but no one would believe him, much to his dismay.

The guest stars of the episode are budding young actors Yeo Jin Goo (Potato Star 2013QR3), ZE:A's Im Siwan (The Attorney) and Tiny G's Dohee (Reply 1994).