Preacher, Captain America and Mamma Mia! alum Dominic Cooper says his new TV series, The Last Frontier, is compelling entertainment that also explores important themes like truth and morality.

"Jon Bokenkamp, our show-runner, refers to it as a cheeseburger, which I didn't understand at first. But I think what he means is there's something for everyone and it felt like, and he's described it, a 1990s[-style] blockbuster action piece, but, at the same time, it's complex," Cooper said.

"People are desperately needing to follow a complex story-line about issues that are important and reveal truths and lies about the society in which we live."

Airing Fridays on Apple TV+, the series casts Jason Clarke as Frank, a U.S. Marshal whose quiet life in Alaska is upended when a plane filled with dangerous criminals -- including Cooper's former CIA asset Havlock -- crashes into the snowy mountains under his jurisdiction.

Magnificent Seven and Hillbilly Elegy actress Bennett, 37, called the show an "epic" story that also depicts intimate interpersonal relationships.

"What drew me in about the project was the humanity and the survival and truth and how people hold on to their values when everything is falling apart and what the truth is really changes and transforms over the 10 episodes," she said.

Cooper added: "Sometimes when you do the complex pieces with great dialogue and really challenging roles with other actors, you go, 'Oh, I really miss doing action.' And then sometimes when you're doing action, you go, 'I just need something more complex.'

"This had everything, so I couldn't complain," Cooper laughed. "There's also sex. There's relationships within this nightmare world, which a lot of people have to live in, survival and dealing with the integrity of a country, the diplomacy of a country. At the same time, they're real people. They have to live normal lives, as well. They exist, these people, and I don't know how they do it."

Bennett noted that there are big differences between the Alaskans, the plane crash survivors who terrorize them and the shadowy government agents who seem to know more about the whole situation than they are letting on.

"There's such a contrast between the community in which Frank is living in, where everybody takes care of each other, and then the world in which they live in, where it's every man for himself," she said.

"On a deeper level, beyond the action, what this is a commentary of is, what we are all doing here, what we're all doing and how we get ourselves into morally ambiguous situations."

"It's every man for himself now and morals are at an all-time low. People don't know what their moral compass is. We allow politicians to lie now. You can lie. It's official. You're allowed to talk absolute garbage straight-up," he added. "There's no such thing as facts any more."

Bennett said she hopes these themes resonate with audiences.

"Last Frontier isn't about survival in the wild. It's about emotional survival and what it costs to hold on to your truth," she added.