[6] The resulting unit would release their debut extended play under Stone Music Entertainment and promote together for a year.

[8] After their contract period ended, the members were allowed to join any girl groups or projects that their agencies were planning.

[7] On December 17, 2015, 98 out of the 101 contestants were unveiled for the first time on Episode 453 of M Countdown, where they performed the show's theme song "Pick Me".

The event was attended by the contestants, the presenter Jang Keun-suk, and the five vocal, dance, and rap mentors, namely Brown Eyed Girls' JeA, Kim Sung-eun, Kahi, Bae Yoon-jung, and Cheetah.

[15] In the Asia and North America regions, the show premiered on May 4, 2016, and was then broadcast through Channel M every Wednesday starting from May 11.

During the last episode, which aired on April 1, 2016, presenter Jang Keun-suk announced the girl group's name: I.O.I (Korean: 아이오아이).

The episode then flashes back to the guerilla concert held by the top 22 girls, where they performed their songs from the concept evaluation and eliminated trainee, Show Works' Hwang In-sun, acted as the MC.

[65] Controversy arose after Ilgan Sports leaked the contract terms between CJ E&M and the Produce 101 trainees' agencies to the public on February 16, 2016.

According to the contract, the agencies and trainees are prohibited from legal action against manipulated edits made on the show and from revealing unreleased information.

On November 18, 2020, the court revealed that the show was manipulated within trainees in the 1st round of voting for Kim Suh-yeon and Seo Hye-Lin, who passed the 1st Elimination.