[s2e8] Into The Deep -

To enter the Netherworld, Mary Margaret initially goes to sleep, but eventually, David must be put under a by Regina and Mr. Gold to reach her.

: Cora attempts to steal the enchanted compass from Emma and Mary Margaret in the Enchanted Forest, while David puts himself in danger in Storybrooke to communicate with them. Key Plot Points [S2E8] Into the Deep

You can find this episode on streaming platforms such as Apple TV or Disney+. "Once Upon a Time" Into the Deep (TV Episode 2012) - IMDb To enter the Netherworld, Mary Margaret initially goes