It's that time of the year again. The popular Mnet idol competition show is coming back with season 4, 'Produce X 101.'

The preview for episode 1 gives a sneak peek into the fiery competition. Trainees react to the participation of JYP and YG trainees, and 'SKY Castle' actor Lee Yoo Ji. MC Lee Dong Wook also reveals, "This year, the number of debut members is not 11."

The first episode is airing this Friday, May 3.