# Infinite Challenge (무한도전)
**Infinite Challenge** (무한도전, Muhan Dojeon) is a South Korean reality comedy variety show broadcast by MBC, in which a fixed cast of comedians and entertainers takes on a new, largely unscripted challenge each week, from absurd physical contests to year-long projects such as producing original songs. It aired in MBC's Saturday prime-time slot in a 90-minute format[1](https://content.mbc.co.kr/english/format/2624489_56316.html) and is credited as the show that originated Korea's "real variety" genre, a hybrid in which a loose mission replaces a fixed script and a stable cast reacts to it across years of episodes[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805). The broadcast ended in 2018 after 563 episodes under the standalone title[3](https://content.mbc.co.kr/program/format/2600554_64960.html) • [4](https://seore.org/w/%EB%AC%B4%ED%95%9C%EB%8F%84%EC%A0%84).
| Key fact | Detail |
|---|---|
| Korean title | 무한도전 (Muhan Dojeon) |
| Broadcaster and slot | MBC, Saturday prime time, 90 minutes[1](https://content.mbc.co.kr/english/format/2624489_56316.html) |
| Origins | Predecessor 무모한 도전 (Reckless Challenge) first aired 23 April 2005 as a corner of the program 강력추천 토요일[5](https://welcon.kocca.kr/cmm/fms/CrawlingFileDown.do?atchFileId=FILE_503914a4-aac8-4469-9351-70bf69e8da73&fileSn=1) |
| Standalone launch | Relaunched as 무한도전 on 6 May 2006 under producer Kim Tae-ho[6](https://www.tenasia.co.kr/article/2018033198034) • [7](https://enter.etoday.co.kr/news/view/103348) |
| Cast | Yu Jae-seok, Pak Myeong-su, Jung Jun-ha, Jung Hyeong-don, No Hong-cheol, and Gill listed by MBC, with Haha among the founding members[3](https://content.mbc.co.kr/program/format/2600554_64960.html) • [8](https://www.yna.co.kr/amp/view/AKR20180112117600005) |
| Peak rating | TVR of 31.83 on 19 January 2008 (TNS, capital region)[9](https://www.contentasia.tv/sites/default/files/print-publications/0211_1Jun_emag_WEB.pdf) |
| Genre status | Reported as the first "real variety" show in Korean television history[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805) • [10](https://moviespack.com/shows/similar/infinite-challenge) |
| End | Broadcast concluded in 2018; the standalone run is recorded as 6 May 2006 to 31 March 2018, 563 episodes[3](https://content.mbc.co.kr/program/format/2600554_64960.html) • [4](https://seore.org/w/%EB%AC%B4%ED%95%9C%EB%8F%84%EC%A0%84) |
## Origins
The show began as an unpolished experiment. On 23 April 2005, MBC aired 무모한 도전 (Reckless Challenge) as a single corner inside the Saturday program 강력추천 토요일, with the premise of "reckless and ridiculous challenges by inadequate people": tug of war against a bull, a footrace against a subway train, and scooping bathwater with a ladle[5](https://welcon.kocca.kr/cmm/fms/CrawlingFileDown.do?atchFileId=FILE_503914a4-aac8-4469-9351-70bf69e8da73&fileSn=1) • [6](https://www.tenasia.co.kr/article/2018033198034). The corner attracted little attention and ratings were below 6 percent per episode[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805) • [11](https://discover.hubpages.com/entertainment/Infinity-Challenge-vs-1N2D-vs-Running-Man).
**Reinvention.** After a reorganization stripped the block of every other corner, the segment was relaunched as 무리한 도전 (Unreasonable Challenge) after 29 October 2005, and producer Kim Tae-ho took over its direction. Kim diagnosed the original program's failure as an absence of defined characters and set about building them. A further reorganization in 2006 separated the segment from 강력추천 토요일, and on 6 May 2006 it began airing as the standalone program 무한도전[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805) • [6](https://www.tenasia.co.kr/article/2018033198034) • [7](https://enter.etoday.co.kr/news/view/103348).
## Format and signature specials
Unlike most variety programs, Infinite Challenge did not fix itself to a single format. Each episode could adopt a different structure: chase games and survival contests, horror experiences, romance setups, offbeat contests, situational dramas, sports, crime spoofs, song festivals, and visit events[5](https://welcon.kocca.kr/cmm/fms/CrawlingFileDown.do?atchFileId=FILE_503914a4-aac8-4469-9351-70bf69e8da73&fileSn=1). MBC's international format page describes it as a comedy show in which six comedians form a team to carry out creative challenges, with the stated goal of "redefining the impossible" against animals, machines, and each other[1](https://content.mbc.co.kr/english/format/2624489_56316.html) • [3](https://content.mbc.co.kr/program/format/2600554_64960.html).
Several recurring projects became events in their own right. In the Song Festival, each member partnered with a professional musician to write and perform an original duet, with the episodes covering the entire production process through a live performance; MBC notes that songs released through the show reached the national top ten[1](https://content.mbc.co.kr/english/format/2624489_56316.html). Other example missions described by MBC include Money War, in which each member started with US$1,000 and had 24 hours to turn a profit by any legal means; Yes or No, a journey decided entirely by binary choices at each fork; Other People's Life, in which members swapped professions with people they admired for a day; and Calendar Model, an annual project whose calendar became a best-selling item before the [New Year](https://www.edgepedia.org/new-year)[1](https://content.mbc.co.kr/english/format/2624489_56316.html).
**Muhan Corporation.** One fictional strand drew particular academic attention: the Muhan Corporation (무한상사) series, an eighth-anniversary special run in which the cast members played out the power relations of a small office, functioning in effect as a sitcom. Scholarship on the series argues that the show's long life depended on successful "characterization": each fixed member's persona, built up over years by splicing fiction and reality, allowed the program to generate new stories and comedy even with a thin central plot, and to escape the repetition that usually limits television variety[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805).
## Cast history
The membership was a constant subject of audience scrutiny. From the standalone 2006 launch, Yoo Jae-seok, Park Myeong-su, Jung Jun-ha, and Haha were the only members present from the first broadcast; everyone else came and went[8](https://www.yna.co.kr/amp/view/AKR20180112117600005). MBC's format page lists the lineup as Yu Jae-seok, Pak Myeong-su, Jung Jun-ha, Jung Hyeong-don, No Hong-cheol, and Gill, with [Kim Ku](https://www.edgepedia.org/kim-ku)-san as producer and Kim Tae-ho as director[3](https://content.mbc.co.kr/program/format/2600554_64960.html).
**Mid-run changes.** In April 2015, Kwanghee of the group 제국의아이들 joined through the "Six Men" special, restoring a six-member lineup; in August of the same year Jung Hyeong-don left for health reasons, including an anxiety disorder, reducing the cast to five again. In January 2018 the comedian Jo Se-ho joined, returning the show to a formal six-member system[8](https://www.yna.co.kr/amp/view/AKR20180112117600005).
## Influence and reception
Infinite Challenge is recognized as the first "real variety" show in Korean television history, and the genre it originated spread across Korean broadcasting[2](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805) • [10](https://moviespack.com/shows/similar/infinite-challenge). Contemporary commentary described it as the yardstick that other variety shows were measured against, and it ranked among the leading variety-show brands alongside Running Man and Happy Together in brand-reputation surveys[12](https://www.soompi.com/article/369334wpp/opinion-2011-in-review-variety-show-edition-revolutions-controversies-and-creaky-old-backs) • [13](https://www.soompi.com/article/913425wpp/november-variety-show-brand-reputation-rankings-revealed). The show was also exported as a format: MBC decided to distribute it in December 2015, with one buyer airing it on CCTV-1 in China, and the format's creator is credited as Kim Tae-ho[9](https://www.contentasia.tv/sites/default/files/print-publications/0211_1Jun_emag_WEB.pdf).
**Ratings.** The program's numbers traced its arc. Early episodes ran below 6 percent[11](https://discover.hubpages.com/entertainment/Infinity-Challenge-vs-1N2D-vs-Running-Man); specials such as the Shell We Dance and special forces features in 2007 and 2008 pushed past 20 percent and established the show's golden period[6](https://www.tenasia.co.kr/article/2018033198034). Its highest recorded figure was a 31.83 TVR on 19 January 2008[9](https://www.contentasia.tv/sites/default/files/print-publications/0211_1Jun_emag_WEB.pdf). In 2008 the show drew nearly 30 percent of TV viewers[14](https://kdeepcut.com/posts/what-made-hangout-with-yoo-how-do-you-play-different-from-other/). Even near the end, the 4 March 2018 episode of the "ToToGa 3" H.O.T. special scored an average 10.8 percent in Nielsen Korea, the highest of any variety show aired that Saturday[15](https://www.soompi.com/article/1134809wpp/infinite-challenge-beats-variety-shows-highest-ratings-day).
The broadcast ended in 2018, after 13 years spanning the pilot corner, the interim title, and the standalone program[6](https://www.tenasia.co.kr/article/2018033198034) • [16](https://sports.khan.co.kr/en/article/202605140705007). Its legacy continued in the work of its personnel: the successor program [Hangout with Yoo](https://www.edgepedia.org/hangout-with-yoo), built around the same host, Yoo Jae-seok, replaced Infinite Challenge's fixed ensemble with self-contained "projects" that begin and end on their own, allowing a full cast turnover and a change of producers without a pause in broadcasting[14](https://kdeepcut.com/posts/what-made-hangout-with-yoo-how-do-you-play-different-from-other/).
## References
1. [Infinite Challenge (무한도전) Format page, MBC Global Media](https://content.mbc.co.kr/english/format/2624489_56316.html)
2. [Kim Young-sung, "〈무한도전〉에 나타난 서사전략과 희극성 — 〈무한상사〉 시리즈를 중심으로", 대중서사연구 제30호](https://journal.kci.go.kr/djnar/archive/articlePdf?artiId=ART001829805)
3. [Infinite Challenge program page, MBC Global Media](https://content.mbc.co.kr/program/format/2600554_64960.html)
4. [무한도전, Seore wiki (season run dates)](https://seore.org/w/%EB%AC%B4%ED%95%9C%EB%8F%84%EC%A0%84)
5. ["(사례 3) 〈무한도전〉", Korea Creative Content Agency case file](https://welcon.kocca.kr/cmm/fms/CrawlingFileDown.do?atchFileId=FILE_503914a4-aac8-4469-9351-70bf69e8da73&fileSn=1)
6. ["무한도전 13년史 ① 무모한 도전 → 국민 예능 되기까지", Ten Asia, 31 March 2018](https://www.tenasia.co.kr/article/2018033198034)
7. ["'무한도전' 12년 멤버 변천史", etoday](https://enter.etoday.co.kr/news/view/103348)
8. ["'무한도전' 멤버 변천사…키워드는 6인 체제·게스트", Yonhap News, 13 January 2018](https://www.yna.co.kr/amp/view/AKR20180112117600005)
9. [ContentAsia FORMATS e-magazine, 1 June 2011](https://www.contentasia.tv/sites/default/files/print-publications/0211_1Jun_emag_WEB.pdf)
10. [Shows Like Infinite Challenge (2005), MoviesPack](https://moviespack.com/shows/similar/infinite-challenge)
11. ["Infinity Challenge vs 1N2D vs Running Man (Part 1)", Discover HubPages, 29 September 2019](https://discover.hubpages.com/entertainment/Infinity-Challenge-vs-1N2D-vs-Running-Man)
12. ["[Soompi 2011] Variety Show Review", Soompi](https://www.soompi.com/article/369334wpp/opinion-2011-in-review-variety-show-edition-revolutions-controversies-and-creaky-old-backs)
13. ["November Variety Show Brand Reputation Rankings Revealed", Soompi](https://www.soompi.com/article/913425wpp/november-variety-show-brand-reputation-rankings-revealed)
14. ["How 'Hangout with Yoo' Built a Show Bigger Than Its Host", K-Deep Cut](https://kdeepcut.com/posts/what-made-hangout-with-yoo-how-do-you-play-different-from-other/)
15. ["'Infinite Challenge' Beats Out Other Variety Shows With Highest Ratings Of The Day", Soompi, 4 March 2018](https://www.soompi.com/article/1134809wpp/infinite-challenge-beats-variety-shows-highest-ratings-day)
16. ["From Squid Game to martial law… at this point, a K-oracle", Sports Kyunghyang, 14 May 2026](https://sports.khan.co.kr/en/article/202605140705007)
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