Valentine’s Day aims its sights on the Heck kids when a nervous Brick finds out that his quirky girlfriend Cindy wants him to kiss her on the special day, Darrin asks Frankie and Mike to help out with an exciting scavenger hunt he’s putting together for Sue, and Axl begins to question his girlfriend Devin’s request that he not give her anything for what she considers to be a lame tradition.
A young man claiming to have psychic powers offers his help to the FBI in solving a pair of murders, but when he leads them to additional victims, Jane and the team begin to suspect that he is in fact the killer they’re hunting.
Oliver is thrown by the changes within Team Arrow. He’s used to calling the shots but sees that the team has evolved in his absence and tensions quickly escalate in the lair. Oliver is furious that Laurel has been going out as the Black Canary and tells her to stop risking her life, but when Vertigo hits the streets again, Laurel goes against Oliver’s wishes and tracks down Vertigo who hits her with a full dose of the drug. Laurel’s biggest fears revolve around her sister Sara so the Vertigo causes her to hallucinate an epic fight between Canary and Black Canary. Meanwhile, Chase surprises Thea, and Roy warns Thea to stay away from Malcolm.
Valentine’s Day aims its sights on the Heck kids when a nervous Brick finds out that his quirky girlfriend Cindy wants him to kiss her on the special day, Darrin asks Frankie and Mike to help out with an exciting scavenger hunt he’s putting together for Sue, and Axl begins to question his girlfriend Devin’s request that he not give her anything for what she considers to be a lame tradition.
Peggy discovers the shocking truth about Leviathan but doesn’t realize that her true enemies are even closer than she imagined. Meanwhile, Sousa is close to confirming the truth about Peggy and may just put her in the crosshairs of the SSR.
After Ronnie attacks a physicist, Barry and the team realize they need to go after Caitlin’s fiancé who is now a dangerous meta-human. Barry struggles to balance his duties as The Flash and his relationship with Linda Park. Joe enlists Cisco’s help to reinvestigate the murder of Nora Allen. General Eiling returns to Central City.
When clues in a murder implicate Castle and Beckett’s nemesis, Dr. Kelly Nieman, Castle is called in to consult on the case.
As his troubles escalate to a boiling point, Jimmy finds himself in dire straits. An act of carelessness puts Chuck at risk.
Jimmy works his magic in the courtroom. Unexpected inspiration leads him to an unconventional pursuit of potential clients.
When the partnership between Ellis and Maya reaches a boiling point, Marty devises a plan that Jeannie opposes. Clyde develops feelings for Kelsey as they seek investors for their start-up.