Five years after a shipwreck left him stranded on a remote island, Oliver Queen is discovered and returned home to those closest to him; Oliver tries to right the wrongs of society and his family by creating a secret vigilante persona known as Arrow.
Oliver runs into Laurel at the courthouse and learns she is prosecuting a man associated with his father; the Chinese Triad sends a mercenary to deal with Laurel; Moira and Walter ask Oliver to take over the company.
When someone kills one of Oliver's targets, he searches for the person responsible; Tommy and Laurel are caught in an awkward situation.
While looking into a suspicious murder case, Oliver realizes that one of his targets framed an innocent man; Walter asks an employee to investigate a large withdrawal that Moira made without his knowledge.
When Oliver is arrested for murder, he wants no one but Laurel to be his lawyer; during a lie detector test, Detective Lance asks Oliver about his time on the island.
A gang of bank robbers threatens the city; Diggle encourages Oliver to look past his father's list and help other people in need.
Oliver meets a mysterious woman with dangerous secrets; following an unfortunate turn of events, Tommy seeks Laurel's support.
As Oliver trains Helena to be his ally, the two grow closer; Diggle worries that Helena can't be trusted.
When Oliver learns his mother and sister stopped celebrating Christmas after his disappearance, he decides to throw a Christmas party; Tommy asks Laurel to spend Christmas with him.
Oliver takes a break from being Arrow; Tommy hosts a benefit for the firefighters; Thea tries to lift Moira's spirits.
Diggle and Oliver are at odds when Oliver goes after Diggle's mentor and commanding officer from Afghanistan; Thea thinks Moira is having an affair.
When Thea gets caught using a drug called vertigo, Oliver decides to find the dealer; Laurel defends Thea; Felicity shares disturbing news about Moira.
When Cyrus Vanch, an evil criminal, is released from prison, he plans to take down Arrow and resume his position as leader of the underworld; Oliver questions Moira about names in his father's notebook.
Oliver turns to Felicity for help after he gets shot; Oliver remembers a significant event from the island.
Oliver asks Detective McKenna on a date; a jewel thief targets someone close to Oliver; Thea's purse is stolen.
Oliver and Diggle learn that Deadshot is alive and targeting Malcom; Tommy refuses to attend a benefit honoring Malcom; Oliver tries to balance his relationship with McKenna and his duties at Arrow.
Oliver's ex, the Huntress, threatens to destroy everything and everyone he cares about; Dinah Lance returns and claims she has proof that Laurel's sister is still alive; Thea gets Roy a job at Oliver's nightclub.
An angry resident of The Glades embarks on a killing and kidnapping spree and announces that the Arrow's vigilantism was his inspiration; Malcolm asks Moira to find the person responsible for his attempted murder.
After partying and taking a drug, a woman dies violently; the count escapes from the mental institution; Oliver remembers lessons taught to him by Slade and Shado.
When Deadshot returns to Starling City, Diggle intends to kill him -- with or without Oliver's help; Laurel's attempts to protect a young witness increase friction between Oliver and Tommy.
Having a hard time making amends with Diggle and Tommy, Oliver decides to focus his energy on crossing another name off the list; Tommy reveals a shocking truth to Laurel.
Malcolm tries to end his dealings with Dr. Brion Markov and his team; Moira and Oliver receive a number of unwelcome visitors; Laurel makes a decision.