*Warning - contains spoilers for Slow Horses season 4 episodes 1-2*

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We're now two episodes into the fourth season of Slow Horses, and fans have been delighted to finally meet Hugo Weaving's new character, Frank Harkness.

Weaving previously described his villainous character when speaking with RadioTimes.com and other press, explaining: "He's a piece of work. He's highly trained, highly evolved in one way in his thinking, but he's a renegade, he's out there, and he is completely unsentimental.

"He's ruthless, but he's not without charm. And I'd say in this season, we see quite a lot of urbanity. He's quite an urbane character, but you feel that he's got a lethality, a physicality and a lethality to him as well."

The new season's first episode kicked off with a major twist for River, when he appeared to bite the bullet within moments of the first episode kicking off.

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Fans will now have to watch to see how this storyline develops, as the Apple TV+ series continues to release new episodes.

Meanwhile, you can read on for everything you need to know about the release schedule for Slow Horses season 4, and when fans can expect episode 3 to be released.

When is Slow Horses season 4 episode 3 out on Apple TV+?

Aimee-Ffion Edwards in Slow Horses, with wet hair and wearing a jumper
Aimee-Ffion Edwards in Slow Horses. Apple TV+

While all three previous seasons of Slow Horses have released two episodes at once to kick things off, before moving to a weekly release schedule with each new episode being released on its own, season 4 has gone for a slightly different schedule.

This season, the first episode was released on its own, meaning the entire schedule will see one new episode being released each week.

This means the third episode, which is titled Penny For Your Thoughts, will be released on Apple TV+ on Wednesday 18th September.

Slow Horses season 4 release schedule

Kristin Scott Thomas as Diana Taverner in Slow Horses season 4 standing in formal attire with their arms crossed
Kristin Scott Thomas as Diana Taverner in Slow Horses season 4. Apple TV+

If you're looking for the full release schedule for Slow Horses season 4, then look no further – you can find a full list of the release dates for each of the season's six episodes below.

The season will run from 4th September to 9th October 2024, with the episodes releasing as follows:

  • Episode 1 – Identity Theft – Wednesday 4th September 2024 (out now)
  • Episode 2 – A Stranger Comes to Town – Wednesday 11th September 2024 (out now)
  • Episode 3 – Penny for Your Thoughts – Wednesday 18th September 2024
  • Episode 4 – Returns – Wednesday 25th September 2024
  • Episode 5 – Grave Danger – Wednesday 2nd October 2024
  • Episode 6 – Hello Goodbye – Wednesday 9th October 2024

Slow Horses season 4 release time

Each new episode of Slow Horses season 4 will arrive on Apple TV+ at midnight Pacific Time, meaning those in the UK can watch the episodes from 8am BST.

What is Slow Horses season 4 about?

Jack Lowden and Rosalind Eleazar in Slow Horses, sat at a table in a bar and clinking bottles
Jack Lowden and Rosalind Eleazar in Slow Horses. Apple TV+

The new season of Slow Horses is based on Mick Herron's fourth novel in the Slough House series, Spook Street.

The official synopsis for the season says: "Season 4 opens with a bombing that detonates personal secrets, rocking Slough House's already unstable foundations."

Slow Horses season 4 releases new episodes weekly on Apple TV+ on Wednesdays – sign up to Apple TV+ now.

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