Stress and anger get the better of Kara when she goes too far during a training exercise with Red Tornado, a military cyborg commissioned by Lucy Lane's father, General Sam Lane. Elsewhere, Cat's tough exterior is shaken by a visit from her judgmental mother, Katherine; at the same time, Alex enlists Winn to investigate her father's mysterious death.moreless
Kara is pulled in two directions when babysitting Cat's son, at the same time, National City is hit by a series of bombings. Meanwhile, James feels conflicted when his ex-girlfriend Lucy Lane tries to rekindle their relationship.moreless
Sleeper spies get activated and prepare for assassinations, so the team rushes to stop them.
An undercover cop is exposed and killed, so the team investigate his homicide and are targeted in the process, forcing them to alter their approach.
Diggle discovers that his brother is one of Damien's Ghosts, and Oliver insists on trying to rescue him. Meanwhile, Damien offers Oliver a deal, and Ray contemplates his future now that he's back from the dead.moreless
Jane and Weller go undercover as a top-notch assassin couple in order to protect some lethal info. Meanwhile, David tries to repair his relationship with Patterson; and Carter and Mayfair disagree about how to deal with a menacing person.moreless
Kara's Thanksgiving may be ruined thanks to a tense visit from her foster mother, who seems to disapprove of her daughter's superhero role. There's also the matter of a volatile CatCo employee being transformed into the villainous Livewire to contend with over the holidays.moreless
Team Arrow launches an attempt to rescue a miniaturized Ray from Damien's stronghold. Meanwhile, Felicity begins to wonder if she's losing herself in her relationship with Oliver, and Donna arrives in Star City to pay her daughter a visit.moreless
One of Superman's enemies is gunning for Supergirl, whose powers are tested when the formidable Reactron arrives in National City; at the same time, Cat makes plans to run an exposé on the young hero.moreless
Patterson finds a tattoo predicted a cop's murder, so the team attempt to prevent more attacks by chasing a violent clue trail. Meanwhile, Mayfair tests her bond with Weller when she informs him about some secrets from her past.moreless
The body of a pregnant woman is found on the side of the road while the team is pursuing an international smuggling ring, but they soon discover something surprising about the goods being trafficked.moreless
When Sara starts killing people, Oliver realizes that her body is without a soul and calls in a mystical friend--John Constantine--to reunite Sara's two halves. Meanwhile, Damian sends Quentin on a mission, and the police captain discovers information about Diggle's brother Andy.moreless
Kara's confidence as a superhero is shaky at first, and with good reason. But then a threat to National City forces her to cast her doubts aside in order to capture an escapee from the Kryptonian prison Fort Rozz. Elsewhere, Cat pressures James to use his connection to Superman to land her an interview with his cousin.moreless
The team face a menacing criminal at a remote location, and the case may expose Mayfair's secrets. Meanwhile, Jane and Weller's strained relationship is tested; and Patterson violates the rules in order to figure out a tattoo puzzle.moreless
A gym owner is killed when he's trapped in his own sauna, so the team investigate the world of fitness extremists and uncover an unanticipated threat.
Laurel returns Sara to Star City to reunite with Quentin, but neither one of them reacts as she hoped. Meanwhile, Green Arrow and his team go after crooked cops who are ripping off drug dealers for personal profit, and Oliver prepares for his mayoral candidacy.moreless
After 12 years of keeping her powers a secret on Earth, the now 24 year old Kara Zor-El, Superman's cousin, decides the time has come to embrace her superhuman abilities and fulfill her destiny as a hero. All while trying to keep a job, and her secret identity.moreless
The team must work with the creator of a dangerous app to keep the software from getting into the wrong hands. Jane and Weller make an effort to keep their relationship professional. Zapata struggles with a moral issue.moreless
While Oliver and Diggle set aside their differences to take on a new metahuman in Starling City, Thea and Laurel travel to Nanda Parbat to resurrect Sara and help Thea overcome her growing bloodlust.moreless
A media mogul's wife is driven off of a main highway, and the investigation unearths a secret in an old—and supposedly closed—case.
A hostage situation goes bad and causes strife between the CIA and FBI. Meanwhile, Carter clashes with Mayfair when he reveals that he's skeptical about Jane's loyalties; and Jane meets Weller's family, but the situation proves to be difficult for her.moreless
Jessica Danforth, an old family friend of the Queens, decides to run for mayor of Star City to provide a source of inspiration. A crazed hitman, Lonnie Machin, targets her for death and Oliver and his team are forced to step in. In the past, Oliver infiltrates the island and finds a poppy field run by Baron Reiter.moreless
Patterson and boyfriend, David, decode a tattoo clue that sends the team to the Centers for Disease Control (CDC). While there, the team discovers a hidden message on Jane’s body that uncovers a plot that could have disastrous global consequences.moreless
With Star City in peril from a new gang, Laurel and Thea go behind Diggle's back and ask Oliver and Felicity to come back to help them.
Jane learns she has the same Navy SEAL tattoo as a recently captured jewel thief. Meanwhile, a man from Jane's memory visits her; and Weller and Mayfair are unsure about Jane's role on the team.moreless
An Air Force pilot with a destructive plan is on the team's radar thanks to one of Jane's tattoos. Meanwhile, Jane recalls bits and pieces of an unsettling memory; and Weller believes he might know who Jane really is.moreless
An unidentified woman with amnesia is found in Times Square covered with tattoos, including one tattoo bearing an FBI agent's name, and the FBI realize that these marks are clues to solving crimes in the series premiere of this drama.moreless
In the first-season finale as Jake lies in critical condition, Laura and the team hunt his shooter, an assailant armed with a high-tech new weapon.
To stop Ra's from wiping out Starling City's population, Oliver is forced to reveal his true loyalties. However, when Ra's escapes, Oliver is forced to turn to his friends for help... but they still don't trust him after his betrayal.moreless
A young filmmaker is murdered, and an inexperienced detective causes problems with the investigation as Laura's team search for the killer.