Season 2 (무리한 도전)
Aired from October 29, 2005 to April 30, 2006, the title of Season 2 was 'Excessive Challenge' (무리한 도전). First few episodes were very similar to the first season of the show, but after that they moved into the inside of the studio. They started the quiz show, actually it was a Korean words game, after a word is yelled by a certain member, the next member has to say the word backwards. It also lasted many episodes, it was intended to develop the characteristics of each members. This game succeeded to reveal their unique characteristics.
Episodes
October 29, 2005 Season 2 Episode 1
* Baseball Challenge (Muhan Dojeon Members vs. Baseball Team of Bae-myeong Senior High School)
November 5, 2005 Season 2 Episode 2
* Racing Challenge (A horse vs. A run by Muhan Dojeon members)
November 12, 2005 Season 2 Episode 3
* Fire-fighting Challenge Part 1
November 19, 2005 Season 2 Episode 4
* Fire-fighting Challenge Part 2
November 26, 2005 Season 2 Episode 5
* Sweep (of fallen leaves) Challenge (Automatic Sweeping Car vs. Sweepwork by Muhan Dojeon Members)
Comments Park Myeong-soo Rejoined the Muhan Dojeon
December 10, 2005 Season 2 Episode 6
* 'Mental Calculation' Challenge (The Civil Master vs. Muhan Dojeon Members)
Comments After a huge loss in this challenge, they decided to improve their mental knowledge through a 'quiz'. Since then, the whole concept of this program image has been changed.
December 17, 2005 Season 2 Episode 7
* 'Infinite Challenge-Master of Quiz' went on air.
December 24, 2005 Season 2 Episode 8
* Christmas Special
Comments Haha joined Muhan Dojeon
December 31, 2005 Season 2 Episode 9
* A Year-end Premiere Special
January 7, 2006 Season 2 Episode 10
* New Year's Day Special
January 14, 2006 Season 2 Episode 11
* Master of Quiz
January 21, 2006 Season 2 Episode 12
* Grandmother's house Special
January 28, 2006 Season 2 Episode 13
* Chinese New Year Day's Special
February 4, 2006 Season 2 Episode 14
* Spring Special
February 11, 2006 Season 2 Episode 15
* St. Valentine's Day Special
February 18, 2006 Season 2 Episode 16
* School Graduation Special
February 25, 2006 Season 2 Episode 17
* Flag of South KoreaLee Hyori (Korean singer) Special - Part 1
March 4, 2006 Season 2 Episode 18
* Flag of South KoreaLee Hyori (Korean singer) Special - Part 2
March 11, 2006 Season 2 Episode 19
* Beginning School (Other title: Super blame Special) Special
Comments This special guest was Lee Kyung Kyu (Korean comedian)
March 18, 2006 Season 2 Episode 20
* Episode 20th Special
March 25, 2006 Season 2 Episode 21
* Camping Special
Comments Jeong Jun-ha joined the Muhan Dojeon
April 1, 2006 Season 2 Episode 22
* April Fool Day Special
April 8, 2006 Season 2 Episode 23
* Black Day Special
Comments "Black Day" is a holiday related to romance, like Valentine's Day or White Day, but on Black Day, singles go to eat ja jang mien (black noodles). This is a regular episode in which the members play a game, joined by a guest, Lee Soo Young.
April 15, 2006 Season 2 Episode 24
* New York Special
Comments In this episode, the members play a game called A-Ha. Tony An of idol group H.O.T. takes part in these games as a guest, and in the background, you can see La Risa, a member of a popular Korean show where foreign women in Korea talk about their experiences.
April 22, 2006 Season 2 Episode 25
* China Special
April 29, 2006 Season 2 Episode 26
* Yi Sun-sin (Korean ancient general)'s Birthday Special