"They have so many balls in the air. I hope they can catch most of them," he said of the show's writers. "It's going to be more than who gets the girls, it better be more than who gets the girl and I'm sure it will be. But they have the burden of producing of delivering on those expectations."
Through much of the show, O'Quinn's Locke has butted heads with Fox's Shephard.
As the island's only doctor, Shephard has been burdened by a heavy sense of duty to his fellow castaways, and haunted by a previous life in which he watched his father nearly destroy his career with alcohol. He nearly did the same thing to himself after being rescued at the beginning of season five.
But now, after five full seasons, Fox said he finally has his doctor figured out.
"I think that Jack has finally reached his point in the middle of the fifth season where he really knows who he is and what he's meant to do," Fox said. "Getting there was a huge relief. Because the struggle of this guy and his own self-doubt and being his own worst enemy, and this whole argument of science versus faith and destiny -- he's had a long transition to go through to finally reach the point that he's really committed to the notion that his whole life has been bringing him up to this point."
The cast and crew are still in the dark about the finale. Emerson said they are only about two-thirds of the way through filming the show's final season.
For Emerson and many of the show's other cast members, the end of the show will mean leaving the island paradise they've called home for more than five years.
"It'll be sad," Fox said. "I'm going to savor this next couple months, saying goodbye to this story."
"At the same time," he said, "there is a huge part of me that's excited about the next chapter of my life."