Once Upon a Time Episode 2.03 "Lady of the Lake"
So, to all of us wondering if Once Upon a Time could pull off telling three plotlines in an episode (past Fairytale Land with flashbacks, present-day Storybrooke with Regina, Charming, Henry, Gold, et al, and present-day Fairytale Land with Emma and Snow), without skimping on any of them, the answer was a resounding YES!