Heart Signal

The reality show follows eight people living together for one month as they get to know each other and go on dates. Every night, each cast member sends an anonymous text message to another cast member to show their romantic interest. However, they are not allowed to directly confess their love. Meanwhile, a panel of celebrities and experts watches the show, analyzing the cast members' actions and trying to predict who will text who.{{Cite web|last=|first=|date=May 30, 2020|title='하트시그널3' 8인 로맨스에 요동치는 안방 '연애세포'|url=https://www.donga.com/news/Entertainment/article/all/20200530/101281822/1|access-date=October 27, 2020|website=The Dong-a Ilbo|language=ko}}{{Cite web|last=|first=|date=July 24, 2017|title=짝짓기 예능 통해 본 시대별 연애 방식|url=https://www.donga.com/news/Culture/article/all/20170724/85490021/1|access-date=October 27, 2020|website=The Dong-a Ilbo|language=ko}}

Season 1{{Cite web|last=|first=|date=June 10, 2017|title=[어저께TV] '하트시그널', 드라마보다 쫄깃한 커플게임|url=https://www.chosun.com/site/data/html_dir/2017/06/10/2017061000463.html|access-date=October 27, 2020|website=The Chosun Ilbo|language=ko}}

• Yoon Jong-shin
• Lee Sang-min
• Kim Eana
• Yang Jae-woong
• Shim So-young
• Shindong (Super Junior)

Season 2{{Cite web|last=|first=|date=March 15, 2018|title=[현장]'하트시그널2' 윤종신, '소유·원이 '감각'이라면 나와 이상민은 '바람'"|url=https://www.sedaily.com/NewsView/1RWZMHIXNQ/GL0103|access-date=October 27, 2020|website=Seoul Economic Daily|language=ko}}

• Yoon Jong-shin
• Lee Sang-min
• Kim Eana
• Yang Jae-woong
• ONE
• Soyou

Season 3{{Cite web|last=|first=|date=March 24, 2020|title='하트시그널3' 윤시윤X한혜진X피오, NEW 예측단 '썸벤져스' 탄생|url=https://www.chosun.com/site/data/html_dir/2020/03/24/2020032404641.html|access-date=October 27, 2020|website=The Chosun Ilbo|language=ko}}

• Lee Sang-min
• Kim Eana
• Yang Jae-woong
• Han Hye-jin
• Yoon Shi-yoon
• P.O (Block B)

Season 4

• Yoon Jong-shin
• Lee Sang-min
• Kim Eana
• Kim Choong-gi
• Kang Seung-yoon (Winner) -> Kim Jin-woo (Winner){{Cite web|last=Noh|first=Han-bin|date=June 20, 2023|title=위너 김진우, '하트시그널4' 예측단 합류…강승윤 빈자리 채운다 [공식]|url=https://entertain.naver.com/now/read?oid=117&aid=0003741768|access-date=June 20, 2023|website=Mydaily via Naver|language=ko}}
• Mimi (Oh My Girl)

Season 1{{Cite web|last=|first=|date=July 29, 2017|title='하트 시그널' 윤현찬 셰프 "이태원 경리단길 오너 셰프"|url=https://www.hankookilbo.com/News/Read/201707291512943232?t=20201027010952|access-date=October 27, 2020|website=Hankoook Ilbo|language=ko-KR}}{{Cite web|last=|first=|date=June 30, 2017|title=하트시그널, 관전 포인트? 메기 효과와 인생 상담|url=https://tenasia.hankyung.com/topic/article/2017063057394|access-date=October 27, 2020|website=Ten Asia|language=ko}}

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Season 2{{Cite web|last=|first=|date=April 18, 2018|title="화제성 1등"…'하트시그널 시즌2' 김현우·김도균·임현주·오영주, 직업부터 나이까지 관심도 UP|url=http://www.topstarnews.net/news/articleView.html?idxno=396383|access-date=October 27, 2020|website=Top Star News|language=ko}}{{Cite web|last=|first=|date=April 21, 2018|title='하트시그널 시즌2' 여자 메기 김장미 등장 '달라진 판도'|url=https://www.news1.kr/articles/?3296508|access-date=October 27, 2020|website=News 1|language=ko}}

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Season 3{{Cite web|last=|first=|date=April 2, 2020|title='하트시그널3' 천인우·박지현·임한결, 삼각관계 형성→정의동, 서민재에 '♥'[종합]|url=https://www.chosun.com/site/data/html_dir/2020/04/02/2020040200562.html|access-date=October 27, 2020|website=The Chosun Ilbo|language=ko}}{{Cite web|last=|first=|date=April 29, 2020|title='하트시그널 시즌3' 김강열, 직업은?…'강렬한 외모로 첫 등장'|url=http://www.topstarnews.net/news/articleView.html?idxno=772896|access-date=October 27, 2020|website=Top Star News|language=ko}}{{Cite web|last=|first=|date=May 27, 2020|title='하트시그널 시즌3' 천안나, 승무원→비서 직업 변천사…"새 직장 생활에 몸무게 5kg 늘어"|url=http://www.topstarnews.net/news/articleView.html?idxno=791752|access-date=October 27, 2020|website=Top Star News|language=ko}}

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Season 4{{Cite web|last=|first=|date=March 3, 2023|title='하트시그널4', 5월 론칭…톱 연애 예능의 귀환|url=https://n.news.naver.com/entertain/article/009/0005104392|access-date=July 24, 2023|website=Naver|language=ko}}

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{{Color sample|lightblue}} Male participants

{{Color sample|pink}} Female participants

{{color sample|darkgrey}} Heart Signal was not revealed

{{color sample|#E0CEF2}} Choose each other

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Seo Joo-won from Season 1 got married in 2018 to YouTuber Aori (Kim Min-young) and got divorced in 2022.

Kim Do-gyun from Season 2 got married in 2022 to a non-celebrity who is a yoga instructor. Im Hyun-joo is dating actor Kwak Si-yang.

Park Ji-hyun from Season 3 got married in 2023 to a non-celebrity who is a businessman.

Shin Min-gyu and Yoo Yi-soo from Season 4 dated between April 2023 until late 2024.

Season 1

In 2019, Heart Signal cast member Kang Sung-wook was sentenced to five years in prison for sexually assaulting a woman in August 2017. Fellow cast member Jang Cheon reportedly initially served as Kang's lawyer in the case but resigned after six days.{{Cite web|last=Lee|first=Jae-lim|date=July 31, 2019|title=Kang Sung-wook is sent to prison|url=https://koreajoongangdaily.joins.com/2019/07/31/etc/Kang-Sungwook-is-sent-to-prison/3066233.html|access-date=October 25, 2020|website=Korea JoongAng Daily|language=en}} Kang's sentence was reduced to 30 months in prison in 2020.{{Cite web|last=Lee|first=Gyu-lee|date=July 9, 2020|title='Heart Signal' TV star's rape sentence confirmed|url=https://www.koreatimes.co.kr/www/art/2020/10/688_292573.html|access-date=October 25, 2020|website=The Korea Times|language=en}}

Season 2

Heart Signal 2 cast member Kim Hyun-woo was arrested for drunk driving in April 2018 while the show was airing.{{Cite web|last=|first=|date=October 1, 2018|title='하시2' 김현우, 前 여자친구 논란 이어 음주운전까지…끝없는 구설수|url=http://www.sportsseoul.com/news/read/685280|access-date=October 25, 2020|website=Sports Seoul|language=ko}}

Season 3

After the cast members of Heart Signal 3 were publicly announced, a woman accused cast member Lee Ga-heun of bullying classmates. Cast member Cheon An-na was also accused of bullying. The show's producers denied the allegations.{{Cite web|last=Song|first=Seung-hyun|date=May 4, 2020|title=Revelations by alleged school bullying victims shake Korean TV industry|url=http://www.koreaherald.com/view.php?ud=20200504000572|access-date=October 25, 2020|website=The Korea Herald|language=en}}

While the show was airing, another woman told the media that cast member Kim Kang-yeol had kicked her in the stomach at a nightclub in January 2017. Kim admitted to the incident and apologized on social media.{{Cite web|last=Lim|first=Jang-won|date=June 7, 2020|title='Heart Signal' under fire for participant with assault record|url=http://www.koreaherald.com/view.php?ud=20200607000149|access-date=October 25, 2020|website=The Korea Herald|language=en}}

In May 2023, Yongsan Police Station in Seoul applied for an arrest warrant for Seo Min-jae on charges of violating the Narcotics Control Act. This suspicion was raised when Seo Min-jae made an SNS post revealing that she and her then boyfriend, Nam Tae-hyun, took methamphetamine in August 2022. In September 2022, the police finally collected the hair and urine of Seo Min-jae and Nam Tae-hyun, who were suspected of violating the Narcotics Control Act, and requested an appraisal from the National Institute of Scientific Investigation (NFS).{{Cite web |title=남태현♥서민재, 필로폰 혐의 구속영장…내일(18일) 피의자 심문 |url=https://entertain.naver.com/now/read?oid=609&aid=0000724986 |access-date=2023-05-17 |website=entertain.naver.com |language=ko}}

• [http://m.ichannela.com/program/video_detailPageMob.do?publishId=000000093157&subCateCode=050030 Official Website]

Category:Channel A (TV channel) original programming

Category:South Korean variety television shows

Category:South Korean dating and relationship reality television series