Infinite Challenge — Reckless Challenge
The three regular cast members, joined by three guests, attempt to complete sports-related missions in an outdoor studio. The challenges were based on viewers' suggestions.
01 Tug-of-War Challenge
Apr 23, 200537m
Nothing is impossible! A super-special project to become a top-notch celebrity! "Infinite Challenge"!! The reckless class president, Yoo Jae-seok! The king of hair, Pyo Young-ho! Jeong Hyeong-don, a life lived with one strength! Only the mouth lived! Dr. Noh Hong-cheol! The special guest is Michael Jackson from Korea! Dancer Lee, Lee Jung!! Part 1 of the Super Member's Infinite Challenge! Engage in a tug-of-war with an 800kg bull, the emperor of bullfighting who conquered the whole country! Surprised by the bull's strength, the Infinite Challenge team... Group tire dragging, angry Jeong Hyeong-don struggles.. Severe training continues.. An unpredictable super-special challenge, bull vs human power confrontation!! This Saturday, the laughter bombing begins!!
02 100-Meter Sprint
Apr 30, 200539m
03 Motorboat vs. Paddle Boat
May 7, 200537m
04 Public Bath Challenge
May 14, 200537m
05 Dog-Paddle Swimming Challenge
May 21, 200544m
06 Clothes-Washing Challenge
May 28, 200542m
07 Collecting Coin Challenge
Jun 4, 200538m
08 Stand-Up Challenge
Jun 11, 200541m
09 Car-Washing Challenge
Jun 18, 200537m
10 Pump Challenge
Jun 25, 200535m
11 Digging Challenge
Jul 2, 200537m
12 Special Coverage from Guam - Part 1
Jul 9, 200558m
13 Special Coverage from Guam - Part 2
Jul 16, 200542m
14 Make-a-Noise Challenge
Jul 23, 200545m
15 Mosquito-Catching Challenge
Jul 30, 200535m
16 Summer Special: The Ghost-house Challenge
Aug 6, 200547m
17 Briquette Removal Challenge
Aug 13, 200551m
18 Special Coverage: Top 5 Highlights of 'Reckless Challenge'
Aug 20, 200529m
19 Car-Push Challenge
Aug 27, 200538m
20 Drag the Sled Challenge
Sep 3, 200537m
21 Count 60 Seconds at High Altitude
Sep 10, 200538m
22 Esper Ito vs. Infinite Challenge Members
Sep 17, 200548m
23 Maria Sharapova vs. Infinite Challenge Members, Part 1
Sep 24, 200548m
24 Maria Sharapova vs. Infinite Challenge Members, Part 2
Oct 1, 200538m
25 Arm Wrestling Challenge
Oct 8, 200540m
26 Applying Lipstick on Carnival Rides
Oct 15, 200538m
27 Reckless Challenge Best Moments + Unaired Race with Ostrich Challenge Scene
Oct 22, 200539m