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(Comedian)
Special appearances by Lee Bong-won and Kim Soo-yong
(Firefighters)
International Firefighters' Day Special
(Firefighters)
International Firefighters' Day Special
(Action director, stunt coordinator, actor)
Phone Call Hint Fairy: Lee Byung-hun
(Action director, stunt coordinator, actor)
(Actor)
Enlightenment Vacation Special
The cast head to Aomori, Japan for filming
(Actor)
Enlightenment Vacation Special
The cast head to Aomori, Japan for filming
(President of the Korea Foundation for International Healthcare,
professor at Yonsei University College of Medicine)
Video Hint Fairy: Lee Guk-jong
(President of the Korea Foundation for International Healthcare,
professor at Yonsei University College of Medicine)// (Writer)
(Writer)
Special appearance by Robin Deiana
No broadcast on June 30, 2019 due to the live coverage of the 2019 North Korea–United States DMZ Summit
(Trot singer)
Phone Call Hint Fairy: Son Hyun-joo
(Trot singer)
Special appearances by So Yu-mi, Namoo, YoungTak, YunHee and Kim Bbak
(Current coach of the South Korea national under-20 football team)
Special appearances by Hwang Tae-hyeon, Oh Se-hun and Um Won-sang
(Actor)
Special voice appearances by Jo Dal-hwan, Lee Hong-gi (F.T. Island) and Peniel (BtoB) through phone
Special appearance by Lee Deok-hwa
(Actor)
Special appearance by Lee Deok-hwa
(Basketball coach)
(Singers)
(Singers)
Special appearances by Noh Sa-bong and Han Sang-jin
(Dancers)
Hint Fairy: Cho Jung-sik
Special appearance by Shin Sung-rok (as 1-day apprentice)
(Dancers)
Special appearance by Shin Sung-rok (as 1-day apprentice)
My Master Is A Friend Special
Shin Seung-hwan, Jang Na-ra, Yoo Byung-jae, Peniel (BtoB) (Celebrities)
My Master Is A Friend Special
Shin Seung-hwan, Jang Na-ra, Yoo Byung-jae, Peniel (BtoB) (Celebrities)
(Mixed martial artist, kickboxer)
Special appearance by Julien Kang
(Mixed martial artist, kickboxer)
Special appearance by Julien Kang
(Retired baseball player)
(Retired baseball player)
Special voice appearance by Pak Se-ri through phone
Special appearance by Lee Seung-yuop
(Singer-songwriter)
Phone Call Hint Fairy: Kim Jong-min (Koyote)
Special appearances by Lee Sun-mi and Jang Ji-yeon
(Singer-songwriter)
(Actress)
Video Hint Fairy: Park Chan-wook
(Actress)
(Comedian)
The cast head to New Zealand for filming
Kim Byung-man is the first to appear as a Master twice
(Comedian)
The cast head to New Zealand for filming
Kim Byung-man is the first to appear as a Master twice
(Comedian) The cast head to New Zealand for filming Kim Byung-man is the first to appear as a Master twice
(Film director); (Actress, screenwriter, director)
Phone Call Hint Fairy: Gang Dong-won
100th Episode special
