Infinite Challenge has been reported as the first "Real-Variety" show in Korean television history. The program is largely unscripted, and follows a similar format of challenge-based Reality Television programs, familiar to the audiences in the West, but the challenges are often silly, absurd, or impossible to achieve, so the program takes on the aspect of a satirical comedy variety show, rather than a more standard reality or contest program. In order to achieve its comedic purposes its 6 hosts and staff continuously proclaim, the elements of this show are the 3-Ds, Dirty, Dangerous, and Difficult.
After winning the Top Excellence Award at the "MBC Entertainment Awards", Jun-ha wonders what it would take to win the Grand Award.
Jae-suk, Haha and Kwanghee venture out with guests to find someone who does not know their names.
This time it is Myung-soo, Jun-ha and Se-hyung's turn to find someone that does not know their names. Meanwhile, Kwanghee looks for a new agency.
The members gather to watch and discuss the top five character-related episodes that were picked by the viewers.
The members watch and discuss the top five chase episodes that were picked by the viewers.
The members watch and discuss the top five real variety episodes that were picked by the viewers.
For the final "Legend" episode, the members watch and discuss the top ten slapstick episodes as well as clips from other episodes that didn't make the cut.
After talking about spending more time together, the members start to play a variety of games with consequences for the losing team.
The matches with bets conclude with clay pigeon shooting, soccer and a triathlon.
After four months of gathering around 10,000 viewer opinions both online and offline, a meeting about improving Korea is held with 200 civilian representatives and 5 National Assembly members.
The bill suggestion meeting with civilians and National Assembly members concludes. Later, the members meet with Park Bo-gum in Pyeongchang.
The Pyeongchang Winter Olympics special continues with the members and Bo-gum splitting into teams and riding the bobsled track.
The Pyeongchang Winter Olympics special concludes with a competition involving ice hockey, speed skating and curling. One member of the winning team gets the honor of carrying the Olympic torch.