As David places the tear in Mary Margaret 's eye , she begins to feel Regina 's pain and smell the scent of sardines , leading Emma and Neal to the Storybrooke cannery .
Mary Margaret volunteers to find Regina after helping to kill Cora .
As David places the tear in Mary Margaret 's eye , Mary Margaret begins to feel Regina 's pain and smell the scent of sardines , leading Emma and Neal to the Storybrooke cannery .
Mary Margaret volunteers to find Regina after helping to kill Cora .