Stranger Things
Chapter Four: The Sauna Test
TV Flash files “Chapter Four: The Sauna Test” as hour 21 of 42 in the TV Flash guide — Stranger Things (2016–present) on Netflix, season 3, episode 4, aired 2019-07-04, 53 min.
From the desk
How this hour is filed
This leaf is S03E04: listed hour 21 of 42 in the Stranger Things guide, hour 4 of 8 in season 3. It aired 2019-07-04 (53 min). The listed hour before it is “Chapter Three: The Case of the Missing Lifeguard” (S03E03). Next is “Chapter Five: The Flayed” (S03E05).
Catalog log
Broadcast listing — not a TV Flash recap.
A code red brings the gang back together to face a frighteningly familiar evil. Karen urges Nancy to keep digging, and Robin finds a useful map.
Viewer FAQ
Where does Chapter Four: The Sauna Test sit in the Stranger Things guide?
S03E04 is listed hour 21 of 42 — hour 4 of 8 in season 3, season 3 episode 4.
When did Stranger Things S03E04 air?
Chapter Four: The Sauna Test aired 2019-07-04 and is listed at 53 minutes.
Where should I start?
Season one, episode one. The vanishing is the whole engine. Later seasons assume you already love the party; they will not re-teach the basement.
In the series
Why this series still plays
Watch it as the sleepover that ate a decade: friendship as a combat sport, 80s pastiche with real panic, and drop nights that turned kid stars into a public group project. The gate closed in 2025; the tags did not.
So about last night — last night being whatever night Netflix decided the next volume was a holiday. Stranger Things trained a generation to treat a drop like a sleepover that got out of hand. You did not watch it so much as you survived the group chat with a flashlight under the blanket. (I said spoiler-free. I lied a little.) The kids were on bikes. Then the kids had jobs. Then the kids were on the internet arguing about the kids. That is not a side effect. That is the show.
Filed against
- Millie Bobby Brown as Eleven
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- Finn Wolfhard as Mike Wheeler
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- Winona Ryder as Joyce Byers
Winona Ryder’s Joyce Byers made Stranger Things a mother’s panic as event television — Hawkins as a decade-long group chat, bikes, Eggo lore, ship wars, volume drops, and a final season that actually closed the gate. On TV Flash she is…
- David Harbour as Jim Hopper
David Harbour’s Jim Hopper is the Hawkins cop who made Stranger Things feel like a grown-up hangover inside a kids-on-bikes franchise. 1980s pastiche with real panic, drop nights as holidays, a sheriff who aged with the party. TV Flash…
- Gaten Matarazzo as Dustin Henderson
Gaten Matarazzo plays Dustin Henderson on Stranger Things — the sleepover's loudest loyalty, bikes and gadgets, a decade of drop nights that turned a kid ensemble into public infrastructure. TV Flash files him as Hawkins' grin: friendship…
- Caleb McLaughlin as Lucas Sinclair
Caleb McLaughlin’s Lucas Sinclair grew up on bikes and the Upside Down in Stranger Things — Netflix’s 1980s nostalgia weather system with real ensemble heart. Kid-star heat, public growth, merch-as-event. TV Flash keeps him in the party…