"Enter the Dragon" is the fifteenth episode of the fourth season of the American fantasy drama series Once Upon a Time, which aired on March 15, 2015.
In this episode, Regina goes undercover for the heroes; and Mr. Gold masquerades as Hook, while flashbacks show how she and Maleficent met.
Plot
Opening Sequence
A tree that Maleficent left burning for eternity is shown in the forest.