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In the teaser clip, J.Y. Park states that it is time for the company to debut a new group, but also reveals to the trainees that the performances they held in front of a crowd were, in fact, a crucial stage to determine who would make the debut cut. Along with the shocking statement, the members dive in to hours of hard practice. 

'Stray Kids' will air its first episode on October 17 at 11 PM KST!