Jamie Dornan has opened up about The Fall's second season, hinting that viewers may find out more about his character's dark motivating forces.

Speaking to Digital Spy, the actor said: "You might find out more about him and his reasons for being the way he is.

"I think we set the precedent for that in the first series - it was always a 'whydunnit' - but that's probably explored slightly more in the second series."

Dornan said he was eager to reprise his role as serial killer Paul Spector in the crime drama series, explaining: "I like playing characters who are fractured, broken. I find that more relatable, for some reason. I don't feel that I'm like that myself by nature, but there's just something that you can really grab hold of if people have a darkness in them, I think."

He added that he was determined to return for the second series despite a hectic working schedule, saying: "I've had about a week off in a year and I'm absolutely knackered. I think they had to change a couple of things [in the schedules] but we're all here.

"There was a bit of juggling around, but my goal was always to make sure I was here. I found myself very eager to become him again."

However, Dornan did not seem enthusiastic about a possible third season of the show, saying: "I'm not sure I'd be involved in it, for story reasons." 

Series two of The Fall continues on RTÉ One on Sunday at 9.30pm.