Eddie Redmayne says preparing for The Day of the Jackal role almost ended in off-set disaster

Speaking to Sky News about the challenges of modernising Frederick Forsyth's acclaimed novel, the Oscar-winning actor said it took months of intensive preparation to play a character that assumes a range of different ages and nationalities.

"What's interesting about the Jackal is in some ways he is an actor and this whole series was a kind of actor's playground," he explained.

"I am a sucker for process... so it was languages, it was prosthetics, different costumes... and then all the gun work as well... I had about three or four months prepping, and it was pretty fun."

From the first episode, the actor was required to casually be able to construct a gun out of the internal workings of a wheelie case. While he'd already been given advanced weapons training, his eagerness to take props home to practice could have nearly ended in his arrest.

"There is a moment at which the Jackal constructs this rifle…it is a beautiful bit of prop design…and I'm a really shoddy prop actor, so in Budapest, I asked the prop master if I could take home this case with me to work on it in the hotel," he said.

"I was in the midst of eating some goulash and I suddenly went 'Argh' as I realised that I had left this gigantic sniper's rifle - and the hotel was basically the equivalent of Trafalgar Square - pointing out a window and it was about to be the turndown service.

"I remember running down the corridor and the person that works in the hotel pushing down the towels [trolley] and some extra little toiletries and I just barged through the door and deconstructed this thing... otherwise that could have been a moment because it looked pretty persuasive."

Keeping the action mostly contained onscreen, the star acknowledges it is a risky gamble to attempt a modern reboot of a much-loved classic.

He explained: "I loved it since I was a kid and so when the scripts arrived in my inbox there was definitely a moment of trepidation."

Forsyth's acclaimed novel has had many lives since it came out in the early 70s, but the 1973 film version is how most people will remember the cat and mouse thriller, including its leading man.

"The original film was very much a binary sense of good and evil," Redmayne said.

"We live in a world now, certainly in social media, in which things dictate that there is a right and a wrong and the grey territory is harder to navigate, I suppose... the series makes some sort of gestures towards that."

In the 10-part TV Sky Atlantic series, viewers will see that the Jackal is still an elite assassin carrying out a seemingly impossible hit. But, in this version, James Bond star Lashana Lynch plays an intelligence officer hunting him down.

The show takes in the rise of right-wing extremism, tech megalomaniacs and themes of assassination.

With the attempt on the life of Donald Trump, and a terrifying cycle of violence and assassination in the Middle East, there is something that feels eerily prescient about the timing of the modern reboot.

"What the series does [show] is that there's ambiguity in everyone and I feel that that's kind of where we're at slightly in the world," Redmayne said.

For the actor, the final pulse-raising moment will be finding out what fans and his family make of the drama, not that he'll be tuning in personally.

"Truth be told, nothing would pain me more than watching myself on screen, so I won't be doing that... but I will be encouraging my family to watch it... it was my dad's favourite film," he said.

-SKY NEWS