Season 6 (Arrow)

"See, family, they rely on one another. Family trust each other. See, when the family does well, each member prospers, but if just one person betrays that family..."

- Ricardo Diaz

The sixth season of ​​ premiered on October 12, 2017 on The CW and concluded on May 17, 2018. The season consisted of 23 episodes.

Main cast

 * Stephen Amell as Oliver Queen/The Hood/Green Arrow and Oliver/Dark Arrow
 * David Ramsey as John Diggle/Spartan/Green Arrow
 * Willa Holland as Thea Queen/Speedy
 * 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 and Laurel Lance
 * Paul Blackthorne as Quentin Lance

Recurring cast

 * Adrian Holmes as Frank Pike
 * Jack Moore as William Clayton
 * Audrey Marie Anderson as Lyla Michaels
 * Venus Terzo as Dr. Elisa Schwartz
 * David Nykl as Anatoly Knyazev
 * Kacey Rohl as Alena Whitlock/Kojo Sledgehammer
 * Michael Emerson as Cayden James
 * Sydelle Noel as Samanda Watson
 * Kathleen Gati as Raisa
 * Tobias Jelinek as Sheck
 * Johann Urb as Vincent Sobel/Vigilante
 * Pej Vahdat as Sam Armand
 * Teryl Rothery as Jean Loring
 * Tina Huang as Kimberly Hill
 * Gina Ravera as Lydia Cassamento
 * Kirk Acevedo as Ricardo Diaz/Dragon
 * Manu Bennett as Slade Wilson/Deathstroke
 * Caity Lotz as Sara Lance/White Canary
 * Colton Haynes as Roy Harper/Arsenal

Synopsis
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".

Trivia

 * This season marks the first to have multiple versions of the title card which mostly follows a similar vein to where the logos for each member are shown.  was the first episode to introduce the variant that starts off with the canary for Black Canary followed by the Wild Dog logo for Wild Dog, the T for Mr. Terrific, the eye for Felicity Smoak, the Spartan helmet for Diggle, and finally the Season 6 arrowhead for Green Arrow. Some episodes, beginning with ​ to ​, did not include Diggle's emblem after he temporarily replaced Oliver who stepped down for a while to take care of William. The order starts from most recent member to the longest member of Team Arrow. The mid-season title card changed the emblems for Wild Dog, Mr. Terrific and Black Canary to red instead of the usual color the others have which showed their change into New Team Arrow.  recycled the Season 1 title card while ​ featured Ricardo Diaz's emblem that's shaped into a jade dragon. From ​ to ​, the episodes go back to using the original title card.
 * Rick Gonzalez and Juliana Harkavy were both promoted to series regular following their recurring appearances in the previous season. In addition to the return of Katie Cassidy, Season 6 also marked several departures which included Willa Holland and Paul Blackthorne, and showrunners Marc Guggenheim and Wendy Mericle. Holland was credited up until her last appearance in while Guggenheim transitioned to the role as an executive consultant.
 * The Inside Arrow videos originally featured Wendy Mericle discussing the first seven episodes, and Marc Guggenheim discussing ​ before Beth Schwartz took over to discuss the last seven episodes of the season at the time she was announced as the new showrunner two weeks after aired.
 * This is the first season that John Barrowman doesn't reprise his role as Malcolm Merlyn.
 * This is the first season since season 2 in which the main antagonist is not killed or presumed killed.
 * This is also the first season where the main antagonist's story spans on to the next.
 * This season is similar to Season 3 of ​​. Like Barry, Oliver made disastrous mistakes out of fear & then in the end, he went to prison to pay for his penitence.
 * This is the last season of ​​ to contain 23 episodes. The next two seasons would have fewer episodes.