9 timestamped notes explaining the Korean cultural context in this episode — customs, idioms, food, honorifics, and history, at the moment each appears on screen. These notes discuss events across the whole episode. To see them revealed scene-by-scene as you watch, use the episode page to find an airing.
The woman who calls out to Jeong-woo is a 가사 도우미 (gasa doumi), a paid housekeeper or domestic helper. In middle-class Korean households of the 1990s it was common to employ a live-in helper, especially in homes caring for an unwell family member. Her familiarity with Jeong-woo signals she has been part of the household for a long time.
When Yeong-hun says he feels he is about to die without knowing exactly where, he is speaking literally — he is aware the incense has only minutes left and that dying in the past timeline would erase his present self. Korean drama often uses the phrase '죽을 것 같다' (I feel like I'm going to die) as casual hyperbole, but the show is deliberately subverting that everyday expression to create genuine dread.
Sun-woo's goal of stopping the wedding carries enormous social stakes in Korean culture. Once a couple completes the 혼인 성사 (sacrament of marriage) in a Catholic ceremony, the union is considered spiritually indissoluble. Beyond religion, calling off or disrupting a Korean wedding — even moments before it starts — would bring severe shame (창피, changpi) on both families, making Sun-woo's plan feel almost unthinkable to everyone involved.
Sun-woo states plainly that his older brother died by suicide. In Korean, 자살 (jasal) is the direct clinical term. The show treats this as the tragic endpoint of the distorted timeline Sun-woo created, framing it as the heaviest evidence that his interference caused harm rather than preventing it. If you or someone you know is struggling, the Korea Suicide Prevention Hotline is 1393 (24 hours).
Sun-woo tells the young Jin-cheol he will 'naturally find out in twenty years' who he is — a classic Korean thriller device of weaponising future knowledge. Because Jin-cheol cannot report or explain an encounter with someone who claims to know his entire future, Sun-woo effectively silences him without violence. It echoes the drama's recurring theme that information across time is more powerful than physical force.
The announcements from the 신부 (sinbu, priest) and the references to 미사 (misa, Mass) and 혼인 성사 (sacrament of matrimony) confirm the ceremony is taking place inside a 성당 (seongdang), a Catholic church. Korea has one of Asia's largest Catholic populations, and a 성당 wedding in the 1990s signalled education and a certain social standing.
The Myeongse Hospital fire scandal is the central corruption case driving the series. Arson cover-ups involving construction kickbacks were a real concern in 1990s South Korea, when rapid development often led to buildings that cut corners on fire safety. Whistleblowing on such cases was dangerous — which is why Sun-woo must hand the evidence to a journalist rather than the police, who are shown to be compromised.
The mention of a 삐삐 번호 (ppippi beonho) — a pager number — is a vivid timestamp. Before mobile phones became widespread in South Korea, pagers (called 삐삐 after their beeping sound) were the primary way to reach someone on the move in the early-to-mid 1990s. Asking for someone's 삐삐 number instead of a phone number immediately pins the scene firmly in that era.
Sun-woo tells the young girl to find the 중부 경찰서 출입 기자 — the reporter permanently assigned to cover Jungbu Police Station. Korean newsrooms use the '출입처' (churipcheo) system, where individual journalists are embedded at a single government institution for months or years. This gives them deep inside contacts but also creates the risk of becoming too cosy with their sources — a tension the show has been exploring through Cheol-min's character.