Gay under-butler Thomas Barrow will come right up to “the abyss” when the British period drama Downton Abbey returns Sunday in the UK, Rob James-Collier has said of his character.

The 37-year-old James-Collier discussed with the Daily Mail what's in store for Barrow in the upcoming season, which won't be broadcast stateside until early next year.

“The show's millions of fans will see Barrow not only question his sexuality but try to change it, with devastating consequences,” the paper wrote.

“It's quite a harrowing storyline and I hope it is,” James-Collier told he paper. “Because if it isn't, I haven't done it justice.”

He added that he lost sleep over the storyline.

“Thomas comes right up to the abyss,” he said.