Existed from 2006 to 2018. It used the name Infinite Challenge since 2006. Before that, it was Reckless Challenge in 2004 and Excessive Challenge in 2005, followed by Infinite Challenge & Master of Quiz before becoming Infinite Challenge.

The main MC of Infinite Challenge. Known as the Yoo-God and the Nation's MC. Born in '72. However, in Infinite Challenge, he avoids the Nation's MC title.

Giant Star Park Myung-soo. The oldest member. Good at acrostic poems and famous for his shouting comedy. Born in '70. He likes Yoo Jae-suk.

The 'Dol+I' (Crazy Guy) and a con artist. Had a DUI incident in 2014. Born in '79, he is the same age as Haha and is the youngest. He uses the term 'Hyeong-nim' for the older members.

Claims to be 171.5cm? but has the nickname 'Kid' and is a follower of the Yoo-God religion. Same age as Hong-chul, born in '79. The youngest of the show.

Has the nickname 'Fatty' but it's not used often. Same age as Gil. Has a sharp tongue. Born in '78, he is good at physical comedy.

Has the nickname 'Big Fatty' but it's not used often. Has great chemistry with Park Myung-soo. Born in '71.

Had two DUI incidents in 2014. Shares the same birth month and day as Noh Hong-chul. Considered unfunny. Same age as Hyeong-don, born in '78.

Joined in 2016. Born in '85.

Joined in 2018. Born in '82.

Joined in 2008 but left due to a herniated disk(?) and military enlistment. Good at chase episodes. Born in '80.

The PD of Infinite Challenge since 2005. Very patient. Born in '75.

Often mistaken for Lee Kwang-hee. Active during the Public Wanted episode, but went to the military and was discharged right when the show ended. Born in '88. Has high energy.