When presumed-dead billionaire playboy Oliver Queen returns home to Starling City after five years stranded on a remote island in the Pacific, he hides the ways the experience has changed him. As he reconnects with those closest to him, including his sister, Thea, Oliver appears to be the same wealthy, carefree bachelor they've always known. At night, flanked by his devoted friend, Diggle, Oliver uses his secret persona -- that of a vigilante -- to right societal wrongs and transform the city to its former glory.
At 12 years old, Kara Zor-El escapes doom on planet Krypton to find protection on Earth with the Danver family, where she grows up in the shadow of her foster sister, Alex, and learns to hide the extraordinary powers she shares with her cousin, Superman. Now an adult living in National City and working for media mogul Cat Grant, Kara finds her days of keeping her abilities a secret are over when super-secret agency head Hank Henshaw enlists her to help protect the city's citizens from threats. Finally coming into her own, Kara must juggle her new responsibilities with her very human relationships.
Jim Gordon is a rising detective in corrupt Gotham City, where his late father was a successful district attorney. Brave, honest and determined to prove himself, Jim hopes to return the city to the glamorous, purer version he remembers as a child. He and his partner, legendary Detective Harvey Bullock, must navigate the dirty politics of Gotham's justice system, even as they tackle a high-profile case, the murder of billionaires Thomas and Martha Wayne. Gordon becomes a friend to their young orphan, Bruce.
When over-achieving medical resident Liv Moore attends a party that turns into a zombie feeding frenzy, she ends up joining the ranks of the living dead. Determined to pass as human despite her pale appearance and newly listless demeanor, Liv forms a plan to resist her drive to consume fresh human brains by taking a job at a coroner's office, where she can secretly snack on the brains of corpses delivered there. Soon discovering that she absorbs the memories of those she feeds on, she finds new purpose by posing as a psychic and working with a detective to help solve their murders.
CW and Greg Berlanti expand the footprint of their DC Comics universe with this exploration of the intersection between family life and being a superhero. As a younger man, Jefferson Pierce donned the suit of a vigilante and protected the streets of his city, but he believed he'd left those days in the past. He learns that life doesn't always work out as planned when his daughter, Jennifer -- a star student who is determined to achieve justice at any cost -- gets recruited by a street gang. In order to protect his family, Jefferson sees no choice but to once again become Black Lightning.
When Jane Doe is found naked in Times Square with her memory erased and her body covered in fresh tattoos, Agent Kurt Weller and his FBI team are instantly drawn to the case. Together, they discover each tattoo is a clue, making Jane's body a maze of mysteries that must be solved to uncover her true identity. But as Jane and Weller get closer to unveiling her past and discovering who set this riddle in motion, they find the quandary goes deeper than they ever imagined, involving people they thought they could trust.
Klaus, the original vampire/werewolf hybrid, returns to New Orleans -- which his family helped build -- to investigate rumors of a plot against him, in this spinoff of "The Vampire Diaries." He finds his former protege, Marcel, reigning powerful over its inhabitants, causing growing tension in the supernatural community. Klaus' brother, Elijah, joins him, and they learn that werewolf Hayley has fallen into the hands of a defiant witch who has life-changing information. In hope of reclaiming the city, Klaus and Elijah form an uneasy alliance with the witches to help further their cause.