[Source: Reuters]

“Black Doves” may be packed with assassins and high-octane ‌action sequences, but the joy of the Netflix spy thriller lies in its blend of humour and morally complex characters.

This was shared by Keira Knightley at the London launch of the show’s second season.

Speaking against a backdrop of fireworks over the city skyline, actor Knightley, ​41, told Reuters, “It’s meant to be fun, it’s meant to be ridiculous, but it equally has these really ​interesting characters who are morally very complicated.”

“I think the whole joy of the series is ⁠that both of those things exist at the same time,” she added.

In the new season, spy Helen Webb, played ​by Knightley, juggles her double life as her husband becomes prime minister, while a conspiracy targeting her handler Mrs ​Reed draws her and old ally Sam Young, played by Ben Whishaw, into a dangerous mission.

Knightley and Whishaw said the season was ultimately about “very, very stressful situations”, with Webb willing to do anything to protect herself and Young suffering a “slightly nervous breakdown.”

New cast member Ambika ​Mod, who plays an assassin sent to assist Webb, said she would not usually be drawn to espionage stories ​but was won over by the show’s subversion of genre conventions and compelling characters.

Those characters are key to the appeal of the ‌six-part series, ⁠according to creator and writer Joe Barton, whose previous credits include “Giri/Haji” and “The Lazarus Project”.

Barton said audiences end up rooting for characters who would normally be viewed as villains in a television show.

“You like them enough that you want them to succeed, even though technically they are all mass murderers, psychopaths,” he said. “They should all be in jail, basically,” ​he quipped.

The cast also celebrated ​the inclusion of a ⁠wider range of voices on screen. Welsh actor Gabrielle Creevy said hearing regional accents in a major television series would have made a difference to her growing up.

“I have ​nephews and a niece and a daughter, and I’m so excited for them that ​they get to ⁠hear that accent on a streamer like Netflix,” she added.