What's corroborated

Kate tells Zak she wants to leave MI6.

Kate hopes to arrange visiting rights for Stuart and their children in a mutual country.

Kate meets Stuart by the Russian border in Finland and he explains his actions.

Stuart exchanged information for the Russians to erase him from the video.

Stuart is a Russian asset recruited by SVR chief Igor Borodin in Prague.

Kate discovers that the man in the video is her husband Stuart.

The man in the video was deep faked to hide his identity.

A video of Imogen Conrad having sex in a hotel in Montenegro was leaked, damaging her reputation.

Ryan Walker becomes the new Prime Minister after winning the Labour leadership.

One of the leading candidates to become prime minister was changed to a left-wing populist.

The plot remains mostly faithful to the book, but changes were made to reflect the current political world.

MI6 officer Kate Henderson discovers the truth in the finale.

The finale aired on Tuesday, May 5.

Secret Service is an ITV espionage thriller adapted from Tom Bradby's 2019 novel.

Airport scenes were shot at Farnborough International Gate, not RAF Northolt.

For external shots of Number 10, they used John Adam Street.

Harefield House in Uxbridge served as the Prime Minister's office.

The Old Royal Naval College doubled as government interiors.

The MI6 interiors were recreated on a custom-built set in a 1960s building in Hayes.

Filming in Malta took place in Senglea, Dingli, and Rabat.

The show was predominantly filmed in London and Malta.

The plot involves uncovering evidence that a high-ranking UK politician may be a Russian asset.

The series is adapted from a novel by Tom Bradby.

Secret Service is an ITV drama starring Gemma Arterton as MI6 agent Kate.