The drama stars Gary Oldman (Oppenheimer) as misanthropic has-been Jackson Lamb. Despite his brains, his lot in life is to head up the ‘Slow Horses’, a not-so-affectionate nickname for the MI5 department where promising careers go to die.

The series three trailer sees Lamb saunter into a church with his usual bad attitude and worse dress sense. He is informed by Ingrid Tearney (Sophie Okonedo) that the Slow Horses are expected to go up against a MI5 team gone rogue. To make matters worse, Lamb’s brother-in-arms Catherine Standish (Saskia Reeves) has been kidnapped.

“I need a team of good agents, but I just have the Slow Horses,” Lamb moans.

Far more composed is Sean Donovan (Ṣọpẹ Dìrísù), part of the team gone rogue. In a tone as solemn as it is sinister, he promises “There will be a reckoning”.

The first series of the show premiered on Apple TV+ in April 2022, followed up by series two in December the same year.

The first two episodes of the third series will be available on Apple TV+ on 29 November.  The remaining four episodes will drop one at a time on subsequent Wednesdays, up until 27 December.