Once Upon a Time 4x21 "Operation Mongoose Part 1" & 4x22 "Operation Mongoose Part 2" (Season Finale) - The villains finally get their happy endings and the forces of good are a thing of the past. Once Upon a Time two-hour season finale, next Sunday on ABC!
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Once Upon a Time 4x21 "Operation Mongoose Part 1" & 4x22 "Operation Mongoose Part 2" Promo/Preview (Season Finale) Once Upon a Time Season 4 Episode 21 & 22 Promo Once Upon a Time S04E21 & S04E22 Promo Once Upon a Time Finale Promo