The Diplomat:
Season 4.

If you’re working out whether to clear one evening or keep several Thursdays free, the episode rollout matters. Here’s the release information, followed by a spoiler-conscious route back into the series.

Is Season 4 weekly or all at once?

TVLine reports that all eight episodes will arrive together. Its August 17 report identifies an eight-episode release on the premiere date. That is the basis for the episode count and binge-release information here. Read TVLine’s premiere report.

The Netflix season announcement we checked confirms the date but does not specify the episode count. If you’re coordinating with friends, agree on how far you’ll watch before discussing the season: an entire-season drop makes it particularly easy to get ahead of each other.

What time should you look for the new season?

Netflix says its original shows typically arrive at midnight Pacific. Applying that general policy to October 15 gives the times below. They are expected times, rather than a separately announced Season 4 release hour. Netflix’s release-time policy.

Time conversions by Next Up Guide for October 15, 2026. Phoenix is midnight on this date. A title-specific time displayed by Netflix takes priority over this expected schedule.

For US viewers, midnight Pacific means the start of Thursday. An East Coast viewer checking at midnight local time would still be early under this standard rollout. An evening watch plan avoids the overnight wait.

Where should you catch up before Season 4?

The first three seasons are available on Netflix, according to its official teaser announcement. Netflix’s teaser and catch-up note.

These viewing choices are our suggestions. The linked recap discusses the ending, so it contains Season 3 spoilers.

Who is returning?

Netflix highlights Keri Russell as Kate Wyler and Rufus Sewell as Hal Wyler. Allison Janney and Bradley Whitford, who play Grace and Todd Penn, have been promoted to series regulars. Official cast update.

We’ve left the new-season plot details out of this guide so you can use it to plan your viewing without reading the setup first. If you want a preview, Netflix’s official trailer page is the direct route; it may reveal earlier-season developments.

If Season 4 isn’t visible when you check

Check whether Netflix lists a specific launch time on the title page. If the release should already be available, refresh the browser or close and reopen the app—steps Netflix recommends for newly released titles. Official release help.

For a group watch, save the series link now and agree on an episode limit. That small step keeps the conversation enjoyable for everyone who is catching up at a different pace.