Once Upon A Time S2 Ep 10 - F2F Transformation

Season 2 Episode 10 The Cricket Game
Back in Storybrooke, it is late at night and what seems to be Regina is walking towards Archie's office. Ruby sees her walk into the office and she seems a bit suspicious. When Regina knocks on Archie's door, she says that she wants to have a talk. As Archie is getting Regina's file out of his cabinet, Regina suddenly appears behind Archie. Then she chokes Archie and immobilizes Pongo. She then strangles Archie, concealing him in a haze of purple smoke. When she leaves the office, she walks in an alleyway before transforming back into her true self, Cora.