The Diplomat Season 4 Debuts with Perfect Rotten Tomatoes Score

The political thriller series The Diplomat returned to Netflix for its fourth season on October 15, debuting with a flawless 100 percent critics' score on Rotten Tomatoes. Despite achieving the highest critical rating in the show's history, the eight-episode release landed at No. 2 on the United States streaming charts.

Data from FlixPatrol for October 20, 2026, placed the sea-monster miniseries Below in the top spot. Below, which follows a creature terrorizing a Newfoundland town, premiered a week prior on October 8 and maintained its lead over the political drama five days after the new season dropped.

The Diplomat's opening critics' score marks a steady upward progression for the series on the review-aggregation platform. Previous installments opened with 84 percent for Season 1, 95 percent for Season 2, and 97 percent for Season 3.

Reviewers noted that the initial 100 percent score relied on a small pool of seven submitted reviews at launch, meaning the percentage remains subject to change as more critics evaluate the new episodes. An official audience score for the fourth season had not yet debuted as viewers began experiencing the latest chapter.

Starring Keri Russell as diplomat Kate Wyler, the fourth season explores ongoing geopolitical tensions and the strains on her marriage following a fateful event that disrupts a fragile peace brokered between the United States and the United Kingdom. The series previously earned Emmy recognition for its third season, which included an Outstanding Supporting Actress in a Drama Series win for Allison Janney.

Reviewers have praised the show's handling of modern political themes. ScreenRant critic Angel Shaw awarded the season an 8 out of 10 rating, noting that the narrative tackles what individuals with less power are willing to tolerate from those with greater power, culminating in a powerful cliffhanger twist.

Netflix has not yet confirmed whether the political drama will return for a fifth season. While the show was renewed for its fourth installment before Season 3 premiered in 2025, future decisions regarding the series will depend heavily on its performance and viewership numbers on the streaming platform.