Cinderella looks for her stepfamily to finish her story, while David takes a message to Gold from Belle and Regina asks Hyde for information on how to beat her dark half.
A date in public backfires on Cat and Vincent. Cat learns something from Gabe that gives her hope in finding a cure for Vincent.
Evan finally tells Cat her loves her but also reveals he's the one who lead Muirfield to Vincent. Gabe uncovers evidence that someone in the department was feeding information to the vigilante.
New Assistant District Attorney Gabe Lowan shows up at the precinct and immediately starts asking questions to understand why cases involving the vigilante have been mishandled. Cat continues doing everything she can to protect Vincent by any means necessary, and she tracks down a witness and threatens him at a gala masquerade ball. Meanwhile, Vincent is concerned that he might lose control and hurt Cat if they get romantically involved.moreless
Cat starts to believe that Muirfield might have tracked down Vincent, and despite her promise to avoid seeing him, Cat has to interrupt his romantic cabin getaway with Alex to protect them. Meanwhile, Evan finds a bug in his lab, which makes him start to believe J.T.'s warnings about the dangers of his research.moreless
With Catherine's father's wedding quickly approaching, his fiancee and the bridesmaids try to find Catherine a date for the wedding. Not wanting to be set up, Cat feels pressured to admit that she's seeing somebody and reveals to Vincent that she wishes he could be her date for the wedding. At the wedding, Cat learns some startling news about a research grant that Evan received to study the mutant DNA cells that have been turning up at local crime scenes. After Cat tells Vincent about Evan's theory of how the cells are evolving to become more animal-like and less human, she faces an unexpected detour that could change the course of their relationship. Meanwhile, Tess and Joe cross the line romantically, even though Joe is married.moreless
JT worries that Vincent may be implicated in Cat's murder investigation after she mentions that a local college frat brother was brutally killed. JT examines Vincent, hoping to understand the cause of his blackouts, but Vincent starts to to transform into the beast, forcing JT to tranquilize him. Meanwhile, Evan and his new intern notice an unusual cut on the victim's ankle, which looks very similar to a cut that Evan found on a female cadaver left on campus a year earlier. As Evan tries to piece together more clues from the crime scene, someone kidnaps him, and Cat turns to Vincent to track down Evan and save his life. However, she doesn't realize that she's risking Vincent's life by asking for his help.moreless
As the date of the vow renewal approaches, Bridget decides she needs to reveal her true identity to Andrew. Meanwhile, with Bodaway Macawi closing in on Bridget, Agent Machado is forced off the case, and Henry struggles with the decision to tell Bridget the truth about Siobhan.moreless
Bridget decides that the best option to protest her safety is to testify against Bodaway Macawi. Meanwhile, Agent Machado gets suspended from the FBI. With Henry's patience for Siobhan's plan growing thin, tells her she needs to give up her revenge plot or they cannot be together.moreless
Agent Machado's history with his informant, a stripper named Shaylene Briggs, comes to light, and Siobhan is able to deceive Malcolm by pretending to be Bridget. In Paris, Tyler takes an important piece of evidence from Siobhan that she needs to execute her plan for revenge. Henry realizes that Bridget knows more about the situation than he first thought and works to keep her from interfering with his plans.moreless
Bridget visits the placesSiobhan went to before she disappeared and findsSiobhan's secret office. Olivia blackmails Henry in introducing her to Gemma's rich father.
Henry thinks he has identified a suspect in the disappearance of his wife, Gemma, but realizes that he needs to work with Bridget to find out more information. Malcolm goes to the police about his suspicion of Charlie, while Juliet's interest in her teacher, Mr. Carpenter, begins to turn into an unhealthy obsession. Meanwhile, back in Wyoming, Agent Machado meets with an informant.moreless
With Agent Machado pressing down, Bridget, still pretending to be Siobhan, tells Andrew and Henry that she has a twin sister. Henry is now suspected of being responsible for Gemma's disappearance. Juliet's partying is out of control. After escaping, Malcolm is on the run from his kidnappers.moreless
Bridget, still posing as Siobhan, takes a trip to the Hamptons with Andrew, Gemma, and Henry to celebrate her birthday. Despite the close proximity to Gemma and Andrew, Henry is determined to rekindle his affair with Siobhan. Gemma learns some upsetting news, and FBI agent Machado uncovers some new information, which forces Bridget to reveal some information about her past in order to protect her secrets.moreless