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- S4.E1 ∙ Golf Putting Challenge: Part 1
- S4.E2 ∙ Golf Putting Challenge: Part 2
- S4.E3 ∙ Space Special
- S4.E4 ∙ Wedding Special
- S4.E5 ∙ World Cup 2006 Special - World All-Stars
- S4.E6 ∙ World Cup 2006 Special - South Korea vs. Togo
- S4.E7 ∙ World Cup 2006 Special - South Korea vs. France
- S4.E8 ∙ World Cup 2006 Special - South Korea vs. Switzerland
- S4.E9 ∙ Summer Vacation Special - Hawaii Swimming Pool Special
- S4.E10 ∙ Summer Vacation Special - Bali Swimming Pool Special
- S4.E11 ∙ Quiz Challenge with Shinhwa: Part 1
- S4.E12 ∙ Quiz Challenge with Shinhwa: Part 2
- S4.E13 ∙ Summer Evening Features - Deserted School
- S4.E14 ∙ Summer Evening Features - Deserted House
- S4.E15 ∙ The Fellowship of Ice in Queenstown, New Zealand
- S4.E16 ∙ The Two Hot Springs in Queenstown, New Zealand
- S4.E17 ∙ The Return of the Bare-Faces in Queenstown, New Zealand
- S4.E18 ∙ Fedor Emelianenko Special: Part 1
- S4.E19 ∙ Fedor Emelianenko Special: Part 2
- S4.E20 ∙ Please, Be Friendly - Haha & Jeong Hyeong-don Break the Ice: Part 1
- S4.E21 ∙ Please, Be Friendly - Haha & Jeong Hyeong-don Break the Ice: Part 2
- S4.E22 ∙ Chuseok Special
- S4.E23 ∙ Hyeong-don, Let's Play!
- S4.E24 ∙ Autumn Picnic Special
- S4.E25 ∙ Farming Village Special
- S4.E26 ∙ Kim Su-ro Special: Please Be Fooled!: Part 1
- S4.E27 ∙ Kim Su-ro Special: Please Be Fooled!: Part 2
- S4.E28 ∙ Infinite Challenge! Supermodel: Part 1
- S4.E29 ∙ Infinite Challenge! Supermodel: Part 2
- S4.E30 ∙ Kimchi Preparation Challenges
- S4.E31 ∙ Youth Athletic Tournament Special
- S4.E32 ∙ Christmas Special #2
- S4.E33 ∙ Christmas Special #3
- S4.E34 ∙ 2006 Infinity Challenge Awards
- S4.E35 ∙ New Year Special
- S4.E36 ∙ Noh Hong-chul's X-Files - Who Owns the Red High Heel?
- S4.E37 ∙ Infinite Doctors - Examining Jeong Hyeong-don
- S4.E38 ∙ 1970's-80's Special at the Roller Rink
- S4.E39 ∙ Special Language Training (Paju English Village)
- S4.E40 ∙ Alaska Special (Hanamana Song)
- S4.E41 ∙ 2007 Lunar New Year's Day Special
- S4.E42 ∙ MBC Infinite Challenge's 100 Minute Debate/Hanamana Song Music video/Spicy Chocolate (Hidden Camera)/Golden Pig Year Special Challenges
- S4.E43 ∙ Beginning School Special - Infinite Challenge Members Become Teachers
- S4.E44 ∙ Making a Drama Challenge: Part 1
- S4.E45 ∙ Making a Drama Challenge: Part 2
- S4.E46 ∙ Making a Drama Challenge - Romance: Part 3
- S4.E47 ∙ Making a Drama Challenge - Romance: Part 4/Park Myeong-su's Big Star Show! #1
- S4.E48 ∙ Jeong Jun-ha's Birthday Hidden Camera/Park Myeong-su's Big Star Show! #2/Hyeong-don, Let's Move!: Part 1
- S4.E49 ∙ Hyeong-don, Let's Move!: Part 2/Hanamana Song Festival: Part 1
- S4.E50 ∙ Season 4 - 1st Anniversary Special #1