[3] As part of Happy Sunday, Qualifications of Men replaced the second season of Immortal Music Classics in late March 2009.
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.
[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 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.
[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.