Leaving the field isn't just difficult; it's lethal. Anyone attempting to exit the town is killed by an "immense dimensional recoil".
The episode is often noted for its dejected, bittersweet ending as the characters deal with the fallout of a timeline that can't be perfectly "fixed". Sanctuary's awesome Normandy follow-up | CliqueClack TV [S3E18] Carentan
Magnus, Will, Kate, and Declan must navigate the tight urban areas and old Nazi bunkers of the French town to find the source of the dilation—a cave on a coastal cliff—before they too are lost to time. Leaving the field isn't just difficult; it's lethal