Guests: Gong Hyung-jin, Kang Ha-neul, Kim Ji-seok, Kwon Hae-hyo, Ku Hye-sun, Lee Sang-yoon, & Seung-ri (Big Bang)

The members continue to try to find and eliminate the secret couple. The relationship virgin reveals themselves to the confirmed single members, and they start to narrow down the candidates for the secret couple through two trials. Will the single members and the relationship virgin be able to find the secret couple? After the secret couple is revealed, a special episode for So Min's birthday begins.

Special events for So Min's birthday continue. After having a meal at a fancy restaurant, So Min and Ji Suk move on to learn how to dance the tango. And another man is expecting So Min to come there. Meanwhile, the other Running Man members are busy solving the quizzes and completing missions as fast as they can to catch So Min.