You Quiz on the Block

Kim Minseop (Educator) & Kim Minseop (Born 1993), Han Kyung-rok (Bassist for the Band Crying Nut), Gwon Hyejeong & Gim Dohyeon & Yun Suim (Elementary School Students), Choi Jae-cheon (Ecologist)

Laure Mafo (Pansori Singer), Kim Suji (Announcer), Jo Geunsik (Pharmacist), Kim Young-ha (Writer)

Heo Tae-gyun (Social Psychologist), Bak Hyangja & Gim Yeongja & Baek Seongja (Hip Hop Crew), Shin Soon-kyu (Financial Analyst), CL (rapper)

I Myeonghui & Jo Heonju (Mother and Daughter), Arul James & Arul Xavier (Catholic Priests), Kim Sun-min & Kim Won-sik (Football Players), Lee Hae-ri & Kang Min-kyung (Singers)

Chung Sun-Gun (Professor of Physiatry), Im Cheonsuk (Singer Im Chan-mi's Mother), Bak Juyeong (District Court Judge), Yoo Ji-tae (Actor)

O Geonyeong (Economic Consultant), Hong Inhye (Webtoon Artist), Kwak Sang-eun (Reporter), Koo Jun-yup (Singer)

Im Chaewon (Prosecutor), Kim Seonggwon (Physician, Father of Kim So-hyun), I Juyeong (Taekwondo Player), Lee Jun-ho (Singer, Actor)

Bak Seryeong (Sport stacking Player), Jo Jinhyeon & Song Nakhun (Camera Operators), Park Hang-seo (football manager), Han Ji-min (Actress)

No Yeongseon (Doctor of Emergency Medicine), Park Kyung-lim (TV Personality), Sang Wook Kim (Physicist), Bae Cheol-soo & Gu Changmo (Members of the Band Songgolmae)

I Jeongwon (Music College Student, Appeared in Episode 1), Alan Kim (Actor), Kim Shin-young (Comedian, Actress), Go Jeonghwan (Nuri Rocket Development Lead)