Arrow was renewed for a sixth season by The CW on January 8, 2017. The show shifted from its usual airing on Wednesdays at 8PM to Thursdays at 9PM from this season onwards. It premiered on October 12, 2017.
- Stephen Amell as Oliver Queen/Green Arrow
- David Ramsey as John Diggle/Spartan
- Willa Holland as Thea Queen
- Emily Bett Rickards as Felicity Smoak/Overwatch
- Echo Kellum as Curtis Holt/Mr. Terrific
- Rick Gonzalez as Rene Ramirez/Wild Dog
- Juliana Harkavy as Dinah Drake/Black Canary
- Katie Cassidy as Laurel Lance/Black Siren
- Paul Blackthorne as Quentin Lance
- Manu Bennett as Slade Wilson/Deathstroke
- Adrian Holmes as Frank Pike
- Colton Haynes as Roy Harper
- Audrey Marie Anderson as Lyla Michaels
- David Nykl as Anatoly Knyazev
- Kacey Rohl as Alena
- Kirk Acevedo as Ricardo Diaz/Richard Dragon
- Michael Emerson as TBA 
- Sydelle Noel as Samandra Watson
- TBA as Vigilante
- Chastity Dotson as Onyx Adams
After a violent shipwreck, billionaire playboy Oliver Queen was missing and presumed dead for five years before being discovered alive on a remote island in the North China Sea. He returned home to Star City, bent on righting the wrongs done by his family and fighting injustice. As the Green Arrow, he protects his city with the help of former soldier John Diggle, computer-science expert Felicity Smoak, his vigilante-trained sister Thea Queen, Deputy Mayor Quentin Lance, brilliant inventor Curtis Holt, and his new recruits, street-savvy Rene Ramirez and meta-human Dinah Drake. Oliver has finally solidified and strengthened his crime-fighting team only to have it threatened when unexpected enemies from his past return to Star City, forcing Oliver to rethink his relationship with each member of his “family”.
Confirmed plot points
- There will be a four-way crossover with Supergirl, The Flash and DC's Legends of Tomorrow.
- According to Stephen Amell, the theme of this season is family.
- William Clayton will have a bigger role unlike the previous two seasons.
- Dinah Drake will get a new love interest.
- Vigilante's identity will be revealed this season and it will be a familiar face.
- Laurel Lance/Black Siren's backstory will be expanded upon.
- Slade will reunite with his son Joseph Wilson, who was mentioned in the previous seasons and will finally appear this season.
- During the four way crossover, Prometheus will return. However, it will not be the Earth-X version of Adrian Chase, but of someone else.
- Ricardo Diaz will appear this season.
- Michael Emerson has been cast in a mystery recurring role.
- In keeping with the season’s found-family theme, a "villainous cabal" rather than a single foe will torment Oliver and Team Arrow throughout the season.
- Helix hacker Alena will be back.
- It has been hinted that Colton Haynes will reprise his role as Roy Harper very soon.
- Thea’s role will once again be reduced due to Willa Holland’s request she made to the producers at the end of Season 4. In addition, Holland will be on a similar deal as she was last season according to Marc Guggenheim, but her episode count for this season is unknown.
Confirmed new characters
- Ricardo Diaz: Diverse. Hardened ex-con recently released from prison for crimes he didn't commit. Ricardo uses his freedom and 25 million dollars in settlement money to establish control over Star City's criminal underworld. He's a martial arts and fighting expert honed by years of life on the street and in prison. 
- Joseph Wilson: The son of Slade Wilson who has followed his father's footsteps by joining the Australian military agency, A.S.I.S. Unfortunately, he is trapped in a remote prison fighting for his life while going under the alias Kane Wolfman.
|#||Episode name||Directed by||Story by||Teleplay by||Original airdate|
|1||"Fallout"||James Bamford||Marc Guggenheim & Wendy Mericle||October 12, 2017|
|Oliver deals with the fallout of the explosion on the island.|
|2||"Tribute"||Laura Belsey||Adam Schwartz||Marc Guggenheim & Beth Schwartz||October 19, 2017|
|Oliver tries to balance being the mayor, Green Arrow and a father to William. Anatoly returns to Star City with a deadly agenda.|
|3||"Next of Kin"||Kevin Tancharoen||Speed Weed & Oscar Balderrama||October 26, 2017|
|A rogue black ops team led by Onyx breaks into Kord Industries and steals something lethal. Oliver struggles to connect with William so he reaches out to a surprising source for help.|
|4||"Reversal"||Gregory Smith||Sarah Tarkoff & Emilio Ortega Aldrich||November 02, 2017|
|Just as Oliver starts to get things in order, Black Siren launches another attack on the citizens of Star City.|
|5||"Deathstroke Returns"||Joel Novoa||Ben Sokolowski & Spiro Skentzos||November 09, 2017|
|Slade returns and asks Oliver for help in tracking down his son. When they learn Joe has been taken hostage by mercenaries, their mission to save him gets complicated by a terrible revelation that could shatter Slade's hopes of reunion forever. Meanwhile, Vigilante reappears in Star City. |
|6||"Promises Kept"||Antonio Negret||Oscar Balderrama & Rebecca Bellotto||TBA|
|7||"Thanksgiving"||Gord Verheul||Wendy Mericle & Speed Weed||TBA|
|8||"Crisis on Earth-X, Part 2"||James Bamford||TBA||November 27, 2017|
|Arrow season 6|
|"Fallout" • "Tribute"|
|"Next of Kin" • "Reversal" • "Deathstroke Returns" • "Promises Kept" • "Thanksgiving" • "Crisis on Earth-X, Part 2"|