The Flash faces a new meta-human named Tony, who can turn himself into girded steel at will. While Dr. Wells and Caitlin are concerned about Barry’s safety, Cisco comes up with a plan to take Tony down. Meanwhile, Iris’s blog on The Flash gets her into trouble, and Eddie witnesses Tony’s abilities firsthand and begins to ask questions that Joe doesn’t want answered. Joe asks Dr. Wells to help him solve Nora Allen’s murder.

When Castle and Beckett learn that a murder victim may have been poisoned at an Old West-style resort, they visit the resort posing as newlyweds to uncover the truth.

The Feds want Cary to work with them as they build a case against Lemond Bishop.

Carrie organizes a last-ditch operation. Lockhart and Martha stall the ISI.

Peter presents Neal’s deal to his superiors at the FBI: Neal will bring down the Pink Panthers in exchange for his freedom. And this time Neal is making sure there are won’t be any technicalities. The stakes couldn’t be higher for Peter either, as Pillar makes it clear that the bureau is intent on bring down the Panthers and Peter could lose his job if Neal’s plan goes south. When Neal finds out that Keller is now part of the Panthers, Peter wants to call off the mission and simply take Keller down once and for all, but Neal knows that this is his last chance. He can’t trust Keller and can’t figure out why he didn’t sell him out to the Panthers right away, unless Keller needs something from him…

Phil and Claire don’t know if they should be happy or concerned that Haley and Andy are spending a lot of time together, however, they soon find things are not what they appear. Gloria is pushing Manny to learn Spanish instead of French so she goes ahead and hires a Spanish tutor, Diego, who also happens to be very handsome, much to Manny and Jay’s chagrin. Meanwhile, Mitch and Cam meet a popular news reporter at a school function and one of them piques her journalistic interest.

After being betrayed by someone she thought she could trust, Clarke takes matters into her own hands and proves she’s not going down without a flight. Bellamy, Finn and Murphy race against time to save a stranger. Meanwhile, tensions rise between Raven and Wick while working together, and an unexpected reunion occurs.

The Heck house once again throws a curve ball to the family when the kitchen sink caves in and drops out of sight, causing Frankie to have to wash the dishes with the outside hose. Meanwhile, Sue is informed that, since Wrestlerettes does not qualify for P.E. credit, she needs to master tinikling — a difficult dance routine for a clumsy Sue — to get the credit she needs to graduate, and after Brick accidentally breaks Mike’s lawn mower, he takes Axl’s advice to try and play the hero card by taking his dad’s wallet then returning it later, thinking this will divert Mike’s attention away from the busted mower.

After a body is found strung up in the Wildcat gym, Ted Grant becomes the main suspect. Oliver and Laurel argue over Ted’s innocence. Meanwhile, in flashbacks, when Maseo needs Oliver to remember where an informant for China White stashed key information, he asks Tatsu to help jog Oliver’s memory. Roy shares a secret with Felicity.

The team discovers murder victims with the alien glyphs on them that Coulson’s been etching. All of Coulson’s secrets and lies come to a head.