He recently said of his return: “Well, coming back was absolutely fantastic because I did think I was going to be coming back in flashbacks as Dougal, that was something we had discussed.
“It was actually the last day on Preacher that the phone rang and it was Maril and she said, ‘We’d like to bring you back.’
“So I thought, ‘Oh yeah, flashbacks and stuff,’ and she said, ‘As your own bastard son.’
“I’m like, ‘Wow, alright,’ and then I had the make-up test for it. I was actually in Scotland shortly afterwards and they did the whole Buck look.”
Outlander seasons 1-5 are available to stream on Amazon Prime Video now.