When River arrives, he finds David standing in the bathroom, shotgun raised.

While comforting David, River investigates his look-alike’s body.

…River wants to help his grandfather, especially since his uneven memory makes him a liability.

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After finding diazepam in the intruder’s pockets, River concludes that he was sent to kill David.

However, the body contains other key information too.

New episodes of Apple TV+‘sSlow Horsesseason 4 premiere on Wednesdays through October 9, 2024.

River Cartwright (Jack Lowden) investigates an object and Diana Taverner (Kristin Scott Thomas) walks down a hall on the phone in Slow Horses season 4 ep 2

Custom Image by Kate Bove

“Now we’re on the clock,” River says in frustration.

In his typically abrasive fashion, Lamb questions both Standish and David.

Before he leaves in a huff,Lamb tells Standish to contact him if Cartwright remembers something significant.

Gary Oldman as Jackson Lamb eating an ice cream and looking confused in Slow Horses season 3 with question marks in the background

Slow Horses is an adaptation of CWA Gold Dagger Award-winning Mick Herron’s first novel in the “Slow Horses” series, which follows a team of British intelligence agents who serve in a dumping ground department of MI5 – Slough House. Gary Oldman stars as Jackson Lamb, the brilliant but irascible leader of the spies who end up in Slough House due to their career-ending mistakes.

AlthoughSlow Horsesseason 4’s premiere episode reveals that Whelan landed the “First Desk” job over Taverner.

Even so,the somewhat inept Whelan seems like the Director General of MI5 in name only.

In the second episode, Taverner exerts even more control over MI5’s activities.

A composite image of River Cartwright walking dramatically in a train station in front of a promo image for Slow Horses featuring the cast in front of a blue backdrop

Evidently,the document was issued by MI5 several decades earlier.

Taverner hides her reaction to the information well.

While Lamb went to “identify” River’s body, he never said the younger Cartwright was dead.

Gary Oldman as Jackson Lamb eating ice cream in the season 3 finale of Slow Horses

Jackson Lamb insists thatSlough House’s emotional and visible reaction to River’s supposed death is a good thing.

Slow Horsesseason 4 is another 6-episode outing.

“You don’t blow a joe’s cover,” Lamb tells his team.

Slow Horses

Still, Lamb shares that River is in France.

Taverner explains that there was a mix-up with the name on the passport Robert Winters vs. Robert Winter.

Later, Taverner meets Whelan at a bus stop.

MI5’s First Desk is incredibly jittery, revealing that he’s never worked in the field before.

In short, Taverner blackmails Whelan into cooperating with her.

A man pulls up to the house, asking for directions.

The two men wonder if their colleague, Bertrand, was killed or if River was actually taken out.

Before the call ends, Weaving’s character tells the assassin to go after another MI5 agent.

Using his broken French, the Slough House agent asks around about Adam Lockhead his look-alike.

A cafe owner points River in the direction of a strange, palatial house near the woods.

Although it’s supposedly abandoned, Lockhead might have some connection to the property.

River soldiers on, climbing walls, pushing through overgrown hedges and breaking glass to enter a compound.

The bizarre objects hint at the fact that something deeply sinister occurred at the compound.

Inside, River finds books about warfare, abandoned weaponry, and children’s prams and toys.

Soon enough, River is attacked by Weaving’s character.