After a force more powerful than anything they have everencountered ruined Cat and Vincent's big day, Cat becomesconvinced they are in over their heads and begins to doubttheir ability to stop the threat, forcing Vincent, JT, Tessand Heather to band together in hopes of convincing Cat of hergreater purpose.
After Bonnie's wedding planner quits, Charlotte volunteers tohelp but she has an ulterior motive. Ben decides to let Dannyand Riley have a chance at romantic happiness.
Riley is not thrilled when Bonnie promotes her to Maid of Honorand demands a crazy bachelorette party, while Brad asks Dannyto be his best man and throw an epic, yet dignified, bachelorparty. Tucker tells everyone he's going to a televisionconvention in Detroit, but he's actually making his annualtrek to Vegas, where he spends one weekend a year living hisdream of being a lounge singer. When the boys discover whereTucker really is, they decide to move Brad's bachelor party tothe desert, which, of course, means Bonnie and Riley areright on their heels. When they accidentally discover Tucker'sact, everyone agrees to enjoy their own nights, but thingsget very interesting when Bonnie ends up handcuffed toillusionist Peter Oliver. Meanwhile, Danny finally admits toBen that he's in love with Riley.
Betty Grissom attempts to deal with the loss of Gus as shearranges his funeral. After finding out that his death mighthave been preventable, she is determined to get some answers.
While searching for a solution to the bat problem in Rio deJaneiro, Mitch and Chloe are kidnapped by the local drug lordand Abraham must come to the rescue. Also, reeling from thecar crash that allowed escaped death row inmate Evan LeeHartley to steal the one piece of evidence they had againstReiden Global, the Mother Cell, Jamie, Jackson and AgentShaffer team up to track him down and lands Jamie in troublewith the FBI.
Alicia plans to tell her ex-bf she still loves him when shesuspects he may be single again soon. Nikki offends Paige overher home turf. Jonathan gets heat for bruises on Eva Marie.
The Stitchers team is on the defense when Cameron and DetectiveFisher are targeted in a shooting. Kirsten’s Stitch leadsthem to Robert Barbiero, a security expert who has worked withMaggie in the past and was close to Kirsten’s mom. As Kirstenfollows the clues that Ed Clark left her, she finds unexpectedanswers to long-held questions. Meanwhile, Linus is jealouswhen Cameron starts training Camille to be his back-up in theStitchers lab.
Patrick investigates who shot at Harper, while she tries totrap Marlon. When this fails, she tries to flip Talia. Ethanturns himself in, but has an exit strategy in play. Harper'srelationship comes undone.