Taking pity on him in his final moments, Brianna shot him in the head as the waves began to swallow him to allow him a quicker death.
Speaking to Collider, Speelers revealed he was not expecting to say goodbye to his character so early.
He said: "I guess me being me, my first reaction I was taken aback to an extent because I felt that I wanted to do more.
“There was lots more I wanted to achieve with the role before he had his final goodbye.
“But also, I guess, from a writing point of view, there’s a lot of people to juggle.”
However, he went on to add how he knew his character was going to die at some point and agreed this was probably the right time for that.
He said: “I felt that this was probably the right time, but it maybe felt a bit premature to start with.
“I guess from a creative point of view, at least the exit strategy was well-written.
“I feel that the script for that final episode was a meaty one, was a good one in terms of the writing and so it was a good opportunity to maybe get the chance to say the things that he’d always wanted to say.”
Outlander seasons 1 to 5 are streaming on Starz and Amazon Prime now
