Earlier, a media outlet reported that Song Seung Heon was cast to play the lead role in Voice 4. In response, Song Seung HeonŌĆÖs agency King Kong by Starship said, ŌĆ£He did receive an offer and is positively reviewing.ŌĆØ About a month ago, OCN confirmed the production of Voice 4 and included it in the roster to air next year. Voice revolves around the fierce struggle of those who work in the 112 call center and guard the golden time of crime scenes. A total of three seasons were aired from 2017 to 2019 and received explosive support from viewers. Lee Ha Na starred in all three seasons, while Jang Hyuk (season 1) and Lee Jin Hyuk (season 2 and 3) took the male lead. In season 4, while maintaining the big framework of Voice, new events and characters will appear against the backdrop of Jeju Island. It will air next summer. Source (1)