Where can I watch The Diplomat for free?

Watch The Diplomat free in HD on Castle. Download the Castle App to stream all seasons and episodes with English, Hindi audio — no subscription, no signup needed.

How many seasons of The Diplomat are available on Castle?

Castle has all 3 seasons of The Diplomat, with a total of 8 episodes streaming free in HD.

What languages is The Diplomat available in?

On Castle, The Diplomat is available in English, Hindi, all in HD.

Who stars in The Diplomat?

The Diplomat stars Keri Russell, Rufus Sewell, David Gyasi, Ali Ahn.

When did The Diplomat first premiere?

The Diplomat premiered on 2025-10-16 and is now streaming free on Castle.

Is the Castle App safe to download?

Yes. The Castle APK is a verified safe file. It requires only basic Android permissions and does not need root access. Compatible with Android 6.0 and above.

The Diplomat

2025•8 epsIMDB 8.0

Crafted by the series creative team, The Diplomat Season 3 brings Keri Russell back alongside Rufus Sewell in a chapter that refuses to slow down. Set against United Kingdom, the season unravels Amid an international crisis, a US diplomat contends with her high-profile job as ambassador to the UK and her strained marriage to a political star. with thriller storytelling across 8 episodes, exploring themes of thriller in ways that elevate the series to new heights.