a South Korean television entertainment program distributed by JTBC on every Saturday at 11:00 pm, starting from December 12, 2015. It was broadcast at 10:00 pm but as of January 23, 2016 it has been moved on the 11:00 pm time slot.
The program's original cast consisted by Kang Ho-dong, Lee Soo-geun, Seo Jang-hoon, Kim Young-chul, Kim Hee-chul, Hwang Chi-yeul and Kim Se-hwang. Min Kyung-hoon was added to the cast formation on the second episode aired on December 12, 2015. Hwang Chi-yeul and Kim Se-hwang left the program after the seventh episode aired on January 16, 2016. Lee Sang-min joined the program as the newest addition to the cast on March 5, 2016.
The cast takes questions sent in from viewers and tries to answer them best to their abilities, through dialogue or experimentation. They have to answer through their own style using everything (body and brain) to find solution for their question. The show's current format, introduced in Episode 17 and considered by many viewers as the best change made to the show, starts each show with a classroom scene with the hosts as students welcoming the guests as transfers. Another common feature is the "Three No's" skit (No Concept, No Basis, No Script), during which the recurring cast take turns interacting with a situation presented by the guests (for example, in the case of Red Velvet, dealing with troublesome daughters.)