The episode alternates between the Underworld in the present day and a flashback to Oz.
Critics and fans on platforms like Reddit often highlight this episode as a turning point for the Underworld arc, though some felt the side plots, like the "haunted phone booth," were less impactful than the central romance. Once Upon A Time S5E16 - Our Decay Review - Daps Magic
This episode establishes the "WickedHades" ship. Reviewers from Daps Magic noted that their interaction, including a ride on Dorothy's bicycle, had "all the makings of a date" and added depth to both villains. [S5E16] Our Decay
Hades reveals his vulnerability, explaining that he either needs True Love's Kiss to restart his heart or must use time travel to switch places with Zeus.
Hades continues to pursue Zelena, revealing that his heart was stopped by his brother, Zeus, and can only be restarted by "True Love's Kiss." He expresses his desire to rule the Underworld with Zelena by his side, claiming they are kindred spirits due to their shared history of abandonment and resentment. The episode alternates between the Underworld in the
Rebecca Mader’s performance as Zelena received praise for balancing "unabashed evil" with her deep-seated abandonment issues.
Snow and David find a way to communicate with their son, Neal, back in Storybrooke using a "haunted" phone booth. Critical Reception Reviewers from Daps Magic noted that their interaction,
Zelena attempts to steal the Scarecrow’s brain to fuel a time-travel spell. She is confronted by Dorothy Gale, who has returned to Oz to protect her friends. During her quest, Zelena encounters Hades, who reveals he wants to help her.