‘Once Upon a Time’ Preview: Operation Mongoose (VIDEO)
Here’s the video preview and synopsis of Once Upon a Time Season 4 Episode 21: “Operation Mongoose” on ABC.
Two hour season finale!
Once Upon a Time 4×21 Promo “Operation Mongoose”
May 10, 2015
For more previews and recaps, check out Once Upon a TimeTV Episode GuideOnce Upon A TimeTV PromoVideo