Single's Inferno, season 4 (솔로지옥 4)
Single's Inferno, season 4 (솔로지옥 4) is the fourth season of the South Korean Netflix reality dating series Single's Inferno, in which single contestants stranded on a deserted island can leave only by matching as a couple for a stay in a luxury location called "Paradise". It premiered on January 14, 2025, and ran for 12 episodes through February 11, 2025, making it the first Netflix Korea unscripted series to reach a fourth season.1 • 2
| Key fact | Detail |
|---|---|
| Premiere / finale | January 14, 2025 to February 11, 2025, on Netflix1 • 2 |
| Episodes | 12, released in weekly batches on Tuesdays2 • 1 |
| Milestone | First Netflix Korea unscripted series renewed for a fourth season1 |
| Viewership | Highest first-week viewership in the franchise's history3 |
| Final couples | Four couples left the island together2 |
| Emcee panel | Hong Jin-kyung, Lee Da-hee, KYUHYUN, HANHAE, and Dex4 |
| Producers | Kim Jae-won, Kim Jung-hyun, and Park Suji4 |
Spoilers
Finale
The season ended with four couples matching and leaving the island together.2 Korean coverage of the final choice identified them as Yuk Jun-seo with Lee Si-an, described as the couple with the strongest mutual attraction; Kook Dong-ho with Kim Arin, a stable and comfortable pairing; Kim Tae-hwan with Bae Ji-yeon, whose relationship had gone through emotional swings; and An Jong-hoon with Kim Hye-jin, who connected in a short time.6
Lee Si-an was the season's central figure. She received choices from three men, Jang Theo, Yuk Jun-seo, and Kim Jeong-su, and remained the focus of attention until the final selection.6
Format
The season kept the series' core structure: singles live on "Inferno", a deserted island with limited resources, and the only way out is to pair up and escape together to Paradise, where couples can get to know each other in comfort. Unexpected rule changes and twists run through the game.1
One structural change opened the season: the cast was split by gender into two Inferno camps on separate islands, which limited the contestants' time together early on.2 Producers Kim Jae-won, Kim Jung-hyun, and Park Suji framed the season as a deeper emotional journey with more intense and honest interactions, saying that "the core of Single's Inferno's success is the captivating cast" and that "Season 4 will be the hottest season yet."4
Release
Netflix announced the season in December 2024, with the main poster and trailer released on January 6, 2025. The first episodes arrived on January 14, and new episodes rolled out each Tuesday thereafter.1 • 4 The season concluded on February 11, 2025, one episode longer than season 3.2
Cast
Thirteen participants appeared in the season, as confirmed by Netflix's cast reunion video listing the 13 members.5 The named cast included Lee Si-an, Kim Hye-jin, Bae Ji-yeon, Chung You-jin, Kim Min-seol, Kim Arin, and Park Hae-lin among the women, and Yuk Jun-seo, Kim Tae-hwan, Kook Dong-ho, Jang Theo, Kim Jeong-su, and An Jong-hoon among the men.5
The studio panel returned intact from season 3: actors and broadcasters Hong Jin-kyung, Lee Da-hee, KYUHYUN, HANHAE, and Dex, with Dex himself a season 2 contestant, comment on the island footage throughout the season.4
Reception
Commercial performance. Netflix reported that season 4 achieved the highest first-week viewership in the franchise's history and sparked lively discussions online, and the company cited it as a direct reason for renewing the show for a fifth season.3 Netflix later stated that season 4 garnered the highest watch hours in its premiere week of any season.7
Critical and audience response. Reception was divided. On Rotten Tomatoes the season holds a Tomatometer based on only 2 reviews, and the Decider critic Liz Kocan wrote that substantial tweaks to the format had vastly improved it over her disappointing experience with season 2.8 Audience reaction was more negative: user reviews on the same page repeatedly called it the most boring or worst season, with one reviewer complaining that Lee Si-an and her connections received roughly 95 percent of the screen time.8
The screen-time concentration was acknowledged from inside the production. Producer Kim Jae-won later told Yonhap News Agency that one issue raised for season 4 was that screen time was too concentrated on just a few people, and that this informed the decision to expand season 5 to 15 participants, the show's largest cast to date.9
Aftermath
Netflix renewed the series for a fifth season on February 12, 2025, one day after the season 4 finale, making Single's Inferno the first Korean reality series on Netflix to reach a fifth season.10 The franchise has since continued: Netflix confirmed production of a sixth season, which it described as making the show Netflix's longest-running Korean unscripted title and the first Korean series to be renewed six times.7
References
- Plan Your Escape to Paradise: Single's Inferno Is Back for Season 4, Netflix Tudum
- Unpacking Single's Inferno Season 4's Suspenseful Finale, TIME
- Single's Inferno Season 5 Confirmed, About Netflix
- Single's Inferno Season 4 Returns January 14: Meet the Hottest Singles in the New Trailer, About Netflix
- Single's Inferno Season 4 Cast Reunion, Netflix K-Content (YouTube)
- 솔로지옥4 이시안-육준서 현커되나, news-wa
- Single's Inferno Renewed for Season 6, About Netflix
- Single's Inferno: Season 4, Rotten Tomatoes
- Single's Inferno producer explains record-breaking Netflix renewal, Yonhap News Agency
- Single's Inferno Season 5: Everything We Know, Marie Claire
Initially written Oct 3, 2026 · Reviewed: Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026; Nov 1, 2026
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