Qualifications of Men

• Episode 1 ~ 3 (Marry twice, Anti-smoking education) : Lee Oi-soo
• Episode 4 ~ 5, 10 (Going to an army twice, Tears) : Nam Jin
• Episode 6 ~ 7 (Nursing a child) : Park Sa-rang
• Episode 12 (Debating) : Kim Sung-soo
• Episode 13 ~ 14 (Knowledge) : Park Jee-seon
• Episode 15 (Paragliding) : Kwon Chang-jin
• Episode 17 ~ 18 (Creating an UCC) : Yoo Se-yoon, 2PM
• Episode 18 ~ 19 (Bicycle trip) : Yoo Se-yoon
• Episode 22 (Wakeboarding) : Lee Kyung-kyu
• Episode 47, 56, 67 ~ 68 (Making a band) : Kim Tae-won
• Episode 63 ~ 65, 70 ~ 74 (Choir) : Kolleen Park[6]
• Episode 93, 121, 135 (Tap dance) : Tap trainer Lee Jung-kwon

As part of Happy Sunday, Qualifications of Men replaced the second season of Immortal Music Classics in late March 2009. In the early episodes, the cast joked that their primary aim was not to disturb the ratings of sister segment 2 Days & 1 Night.

The original cast included the main MC Lee Kyung-kyu, who made his comeback into the Korean TV industry with this show; Kim Gook-jin, a comedian who previously attempted to become a professional golfer; Kim Tae-won, leader of the legendary rock-ballad band Boohwal; Lee Yoon-seok, a comedian known for his doctor's degree and conversely his ridiculously weak strength (though since joining the show, Kim Tae-won took over his title of "Weakling of the nation"); Yoon Hyung-bin, a comedian from the show Gag Concert; and actors Lee Jung-jin and Kim Sung-min.

The cast went through a variety of physically and emotionally taxing missions, usually spanning over 24 hours, performing the likes of serving mandatory military service again, crying, becoming employees of random companies, not smoking for a day, wake-boarding, singing in a choir, participating in an amusement park parade show, and forming an amateur band. The most memorable moment for the program was when 2 of the members (Kim Gook-jin and Kim Sung-min) was selected as a guest for the United States Air Force Thunderbirds Acrobatic Team, during their 2009 Far East Tour at Osan Air Base, in South Korea. For the Choir episodes, both of the Choir teams won awards (with guest Kolleen Park and Kim Tae-won as conductors).

In late 2010, Kim Sung-min was dropped from the program after being arrested for drug use. He was sentenced to 2 years and 6 months in prison for meth use and smuggling, suspended for 4 years.[7]

On April 10, 2011, Korean baseball legend Yang Joon-hyuk (he currently holds the records for home runs, RBI, and best batting average) made his debut as a member of the show.

On May 8, 2011, Lee Jung-jin appeared in his final episode and Jun Hyun-moo became the newest and 7th member of the show. Jun is a KBS news announcer and reporter known for his variety and comedic skills (particularly for his parody of SHINee's "Lucifer" dance).

On July 31, 2012, Yang Joon-hyuk and Jun Hyun-moo left the show, and 2 new members—actor Joo Sang-wook and Gag Concert comedian Kim Jun-ho—joined the crew.[8]

Qualifications of Men initially maintained good ratings; in 2009, it placed second among the most viewed Sunday night programs for 16 weeks with more than 30% viewership ratings.[9] But after four years on air, ratings dropped, until it was overtaken in popularity by MBC's Dad! Where Are We Going?, which premiered in 2013.[10] KBS cancelled the show, and it aired its last episode on April 7, 2013.[11] With its cancellation, the show's raison d'être was unfinished, with the program coming to a close before the cast members were able to finish filling out the list of 101 things, only getting up to #94.[12]

• Happy Sunday official KBS website (in Korean)
• Qualifications of Men at KBS World