On April 14th, Channel A's personnel says "'Heart Signal 4', which returns after 3 years since Season 3, predicts every season from Season 1 with Yoon Jong-shin, who showed sharp analytical skills in Seasons 1 and 2. We have confirmed the joining of Lee Sang-min and Kim Ea-na, who played an active part in the team.”
Yoon Jong-shin, Lee Sang-min, and Kim Ea-na were the original who, along with viewers every season, deduced the heart signals of the young men and women who moved into the Signal House, analyzed their psychology, and cried and laughed together. In season 4, they will once again infer the heart signals of the new residents with detailed analytical skills and candid gestures.
In particular, Yoon Jong-shin returns after 5 years following season 2. As he returned after a long time, he is looking forward to whether he will be able to instinctively catch the signals of the residents once again. Lee Sang-min and Kim Ea-na are the parents of Heart Signal, who drew sympathy from viewers last season with their extraordinary empathy. Season 4 will also show the role of the aid predictor in catching delicate emotional lines as well as sharp psychological analysis based on love data accumulated over the years.
Meanwhile, 'Heart Signal 4' will be broadcast for the first time next month.