Photo via New York Post

‘Slow Horses’ Season 6, Episode 2: How Sid Baker, Olivia Cooke’s Season 1 Character, Finally Returns

Read the original at New York Post ↗
Cite

‘Slow Horses’ Season 6, Episode 2: How Sid Baker, Olivia Cooke’s Season 1 Character, Finally Returns. (2026, September 23). New York Post. https://decider.com/2026/09/23/slow-horses-season-6-episode-2-sid-baker-olivia-cooke-return/

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

New York Post · collected 2026-09-23 · by mliss1578

Quick Summary

In "Slow Horses" Season 6, Episode 2, titled "Daddy Issues," Sid Baker, played by Olivia Cooke in the first season, unexpectedly returns after being presumed dead. The episode recaps that Sid was shot and left in a coma at the end of Season 1, with River believing she had died. This new development comes as River confronts his past issues with Frank Harkness. The return of Sid is seen as either a surprise or an anticipated moment for viewers familiar with Mick Herron’s books.
Written by AI on 2026-09-23, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

In Season 6, Episode 2 of *Slow Horses*, titled “Daddy Issues,” the long-absent character Sidonie 'Sid' Baker returned after being presumed dead since Season 1. Sid's return was either a surprise for viewers or expected by those familiar with Mick Herron’s Slough House books. The episode also featured Frank Harkness (Hugo Weaving) handling business, Diana Taverner (Kristin Scott Thomas) reluctantly doing an interview, and Moira (Joanna Scanlan) facing threats from assassins. Sid's reappearance marks a significant moment for fans who have been waiting to see what happened to Olivia Cooke’s character since her apparent death in the first season.

Written for “Slow Horses TV Show” on 2026-11-03, grounded in this article and the 0 other(s) covering the same event.

Story

📰 Slow Horses TV Show
Entertainment · 1 article(s) covering the same event.

Compared with similar articles

Nothing to compare against. No article is close enough to this one for the pipeline to have linked or judged the pair.
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
52
sentences that state something as happening or true
Uncertain
6%
3 of 52 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
66/100
New York Post's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
1
Entertainment
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-23 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

New York Post · 16405 article(s) · 35 correction(s) detected
Running correction rate · 35 correction(s)

Who wrote this

No reporter is named on this article, beyond the feed's “mliss1578”.

Topics

Season 1 Slough House

Subjects

Sid PERSON · 16× River PERSON · 15× Sid Baker PERSON · 6× Hobden PERSON · 4× Frank Harkness PERSON · 2× Harkness PERSON · 2× Lamb PERSON · 2× Olivia Cooke’s PERSON · 2× Roddy PERSON · 2× Hugo Weaving PERSON · 1×

Narrative

Slow Horses Season 6, Episode 2, “Daddy Issues,” saw Frank Harkness (Hugo Weaving) taking care of business, Diana Taverner (Kristin Scott Thomas) reluctantly doing an interview for Damien Cantor’s (Harry Lloyd) news station, Moira (Joanna Scanlan) being targeted by assassins, and the return of Sidonie Sid Baker — which was either a surprise or long-awaited, depending on whether or not you’ve read Mick Herron’s Slough House books.
framing: assertive · carried by 1 article(s) · first seen 2026-09-23
🔮 I will, but I have to go,” Sid said to the person on the other end of the line.

Claims (52 extracted, 3 hedged)

Slow Horses Season 6, Episode 2, “Daddy Issues,” saw Frank Harkness (Hugo Weaving) taking care of business, Diana Taverner (Kristin Scott Thomas) reluctantly doing an interview for Damien Cantor’s (Harry Lloyd) news station, Moira (Joanna Scanlan) being targeted by assassins, and the return of Sidonie Sid Baker — which was either a surprise or long-awaited, depending on whether or not you’ve read Mick Herron’s Slough House books. asserted
you → see → books
What happened to Olivia Cooke’s character in Slow Horses Season 1? asserted
What → happen → Season
What happened to Sid Baker in the books? asserted
What → happen → books
And how did Sid make her triumphant return in Slow Horses Season 6, Episode 2? asserted
Sid → make → Season
We’ve got answers! asserted
We → get → answers
As noted in our Season 1 recap article, if you feel like you haven’t heard Sid’s name in years, you’re right! asserted
you → note → years
The Slow Horses — and viewers — haven’t seen Sid since Season 1, because she was presumed to be dead. asserted
she → see → Season
Slow Horses Season 1 finds River, Sid, and the rest of Slough House racing to rescue a kidnapped student. asserted
River → find → student
But Episode 1 also saw River and Sid surveilling journalist Robert Hobden (Paul Hilton), which ultimately took a dark turn. asserted
which → see → turn
As River was staking out Hobden’s house alone in Episode 2, Sid hopped in the passenger seat, and the two shared a heart-to-heart, but when River questioned why Sid was in Slough House, she dodged the question — until someone labeled “Aunt Zadie” in her phone called twice, and she finally picked up. “ asserted
she → stake → phone
I can’t talk at the moment. asserted
I → talk → moment
I’m watching him right now… asserted
I → watch → him
I will, but I have to go,” Sid said to the person on the other end of the line. asserted
Sid → have → line
When she hung up, she revealed it wasn’t her aunt. asserted
it → hang → ?
“There’s a reason why I didn’t tell you why I’m at Slough House… asserted
I → ’ → House
I didn’t just follow you today. asserted
I → follow → you
That was Taverner, and I wasn’t telling her I was watching Hobden. asserted
I → tell → Hobden
I was telling her I was watching you… asserted
I → tell → you
It’s the reason I’ve been sent to Slough House. asserted
I → ’ → House
Before we could learn more, someone broke into Hobden’s house, and River and Sid raced to save him. uncertain
River → learn → him
River went inside while Sid covered the front door, and though River rescued the journalist, when the attacker raced outside, a gun was fired, and River found Sid had taken a bullet to the head. asserted
Sid → go → head
As she was bleeding out on Hobden’s stoop, River called an ambulance, and Lamb revealed in Episode 3 that “she might live.” uncertain
she → bleed → Episode
In Episode 4, River snuck into the hospital and found Sid in a coma in her hospital bed. asserted
Sid → sneak → bed
And in Episode 6, Lamb told a devastated River that she’d passed, assuring him, “I won’t forget Sid. asserted
I → tell → Sid
Slow Horses Season 6, Episode 2 Ending Explained: Sid Baker Returns! asserted
Baker → explain → ?
After realizing Frank Harkness was back and posed a deadly threat to the Slow Horses, River decides to face his “Daddy Issues” head-on, so he gets Roddy (Christopher Chung) to trace what he believes to be a call from Harkness. asserted
he → realize → Harkness
Towards the end of the episode, Slough House’s current members meet up at Blake’s Grave and plan to go dark to avoid being tracked. asserted
members → meet → Grave
But River doesn’t show, and Roddy reveals it’s because he went to his grandfather’s house — where the call was coming from — in hopes of handling their Harkness issue. asserted
call → show → issue
The episode’s final minute sees River driving up to his late grandad’s house, grabbing a crowbar, and storming inside shouting for Frank. asserted
River → see → Frank
When he goes to walk up the stairs, however, he’s stopped in his tracks by the sight of Sid standing at the top of the staircase. asserted
Sid → go → staircase
She flashes a smile, says “Hello, River,” and Slow Horses cuts to black. asserted
Horses → flash → black
What Happened To Sid Baker In Slow Horses Books? asserted
What → happen → Books
Yes, your eyes don’t deceive you! asserted
eyes → deceive → you
Sid Baker is still alive, despite the fact that we were told she died in Season 1. asserted
she → tell → Season
So what happened? asserted
what → happen → ?
We’ll have to wait and see how things unfold on screen, but Sid did return in Book 7, Slough House, and asserted
Sid → have → Book
revealed what happened to her after the life-threatening injury she sustained in Book 1. asserted
she → reveal → Book
After River learned of Sid’s death in Season 1, Roddy also gave us a hint that she wasn’t gone for good. asserted
she → learn → hint
“There’s no record of her ever having been at the hospital. asserted
her → ’ → hospital
And when I pop through my own private backdoor into MI5’s database, there’s no record of her whatsoever,” he told River. asserted
he → pop → River
…and 12 more, not listed.
💬Give feedback
🕘History 🎫Support