Outlander makes its long-awaited debut on Starz tomorrow night at 9 p.m. Earlier this year, we got a behind-the-scenes tour of the Scotland set of the show, where we sat down with its stars, Caitriona Balfe and Sam Heughan. We talked to the two about their approach to their "nerve-wracking" love scenes and found out how they managed to land their coveted roles out of a horde of hopefuls. They also explained why they're "not shying away" from the most action-packed — and steamiest — moments from the book the series is based on.