Main Host
- Kim Jong Kook Main Host
- Lee Teuk Main Host
- Yoo Se Yoon Main Host
Regular Member
- Lee Sang Min[Tone-deaf detective]Regular Member
- Joon Park[Tone-deaf detective]Regular Member
- Ahn Sol Bin[Tone-deaf detective]Regular Member
- Jang Do Yeon[Tone-deaf detective]Regular Member
- Shin Dong[Tone-deaf detective]Regular Member
Guest
- Park Je Up[Contestant] (Ep. 1)Guest
- Ha Ha(Ep. 2)Guest
- Park Ye Ni[Contestant] (Ep. 2)Guest
- Kim Jong Min(Ep. 3)Guest
- Kim Min Gue[Contestant] (Ep. 3)Guest
- Kim So Hee[Tone-deaf detective] (Ep. 3, 11, 18)Guest
- BamBam(Ep. 4)Guest
- Kim Yu Gyeom(Ep. 4)Guest
- Choi Young Jae(Ep. 4)Guest
- Park Jin Young(Ep. 4)Guest
- Mark Tuan(Ep. 4)Guest
- Jay B(Ep. 4)Guest
- Lee Dong Hun[Contestant] (Ep. 4)Guest
- Jeon So Mi[Tone-deaf detective] (Ep. 4-5)Guest
- Lyn(Ep. 5)Guest
- Gong So Won[Contestant] (Ep. 5)Guest
- Roy Kim(Ep. 6)Guest
- Shin Bo Ra[Tone-deaf detective] (Ep. 6)Guest
- Joo Woo Jae[Tone-deaf detective] (Ep. 6)Guest
- Kim Jae Woo[Tone-deaf detective] (Ep. 6)Guest
- Tony Ahn(Ep. 7)Guest
- Kang Ta(Ep. 7)Guest
- Park Jun Hee[Contestant] (Ep. 7)Guest
- Ye Sung(Ep. 8)Guest
- Kim Hee Chul(Ep. 8)Guest
- Ben[Tone-deaf detective] (Ep. 8)Guest
- Okyere Sam[Tone-deaf detective] (Ep. 8)Guest
- Cao Lu[Tone-deaf detective] (Ep. 8, 10)Guest
- Park Jeong Hwa(Ep. 9)Guest
- Seo Hye Lin(Ep. 9)Guest
- Ahn Hee Yeon(Ep. 9)Guest
- LE(Ep. 9)Guest
- Yong Jun Hyung(Ep. 10)Guest
- Yoon Doo Joon(Ep. 10)Guest
- Son Dong Woon(Ep. 10)Guest
- Yang Yo Seob(Ep. 10)Guest
- Jeong Sa Gang[Contestant] (Ep. 10)Guest
- Lee Eun Sung[Contestant] (Ep. 10)Guest
- Niel[Tone-deaf detective] (Ep. 10)Guest
- Kim Ji Hyun(Ep. 11)Guest
- Shin Jung Hwan(Ep. 11)Guest
- Kim Won Joon(Ep. 12)Guest
- Eddy[Contestant] (Ep. 12)Guest
- Park Ji Hyo(Ep. 13)Guest
- Hirai Momo(Ep. 13)Guest
- Myoui Mina(Ep. 13)Guest
- Jeongyeon(Ep. 13)Guest
- Im Na Yeon(Ep. 13)Guest
- Kim Da Hyun(Ep. 13)Guest
- Son Chae Young(Ep. 13)Guest
- Chou Tzu Yu(Ep. 13)Guest
- Minatozaki Sana(Ep. 13)Guest
- Klang[Contestant] (Ep. 13)Guest
- Jae Park[Tone-deaf detective] (Ep. 13)Guest
- Jo Kwon[Tone-deaf detective] (Ep. 13)Guest
- Lee Jae Jin(Ep. 15)Guest
- Lee Hong Ki(Ep. 15)Guest
- Choi Min Hwan(Ep. 15)Guest
- Choi Jong Hoon(Ep. 15)Guest
- Song Seung Hyun(Ep. 15)Guest
- Park Do Ha[Lip-sync substitute] (Ep. 15)Guest
- Kangnam[Tone-deaf detective] (Ep. 15-16)Guest
- Hwang Chi Yeul(Ep. 16)Guest
- Yoon Do Hyun(Ep. 17)Guest
- Gu Jun Yeop(Ep. 18)Guest
- Kang Won Rae(Ep. 18)Guest
- Yeom Yu Ri[Contestant] (Ep. 18)Guest
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