After Sara is found murdered, Oliver becomes embroiled in a conflict with Ra's al Ghul (Matt Nable). He struggles to reconnect with his half-sister Thea who knows Malcolm is her father. Laurel sets out to follow Sara as the Black Canary. Meanwhile, John becomes a father and struggles as a family man.

During the course of the series, 170 episodes of Arrow aired over eight seasons, between October 10, 2012, and January 28, 2020.

Damien Darhk In the fourth season, Oliver and Felicity try and start a new life in Ivy Town, but returns to Starling City, now renamed Star City, when a terrorist group known as H.I.V.E. led by the mystically enhanced Damien Darhk (Neal McDonough) is attacking the city.

Ra's Al Ghul Season 3: Ra's Al Ghul The character helped to create one of the most shocking scenes in the show even to this day, with the supposed death of Oliver Queen. As an ancient threat, the introduction of Ra's Al Ghul and his cult allowed the show to move into new territory.

Episode Info Ra's al Ghul sets his plan in motion, putting everyone in danger; Oliver must decide if he is strong enough to handle his new role -- and what it will mean for his team and his soul.

Oliver (Stephen Amell) and Laurel had romantic feelings for each other in the beginning of Arrow, but at least one of them moved on. A love story between Oliver and Felicity took shape starting in Arrow season 2, culminating in a wedding in season 6.

8Arrow / Number of seasons Arrow ended its run in 2020 after eight seasons and 170 episodes, while Supergirl's series finale aired in 2021, six years after its 2015 debut.

Green Arrow, American comic strip superhero created for DC Comics by writer Mort Weisinger and artist George Papp. Nicknamed the “Emerald Archer” for his Robin Hood-like appearance and manner, the character first appeared in More Fun Comics no. 73 (November 1941).

Merlyn/Dark Archer Merlyn/Dark Archer Years later, Merlyn became a mercenary for the League of Assassins and became the archenemy of Green Arrow.

Deathstroke Not only is Deathstroke one of the most capable Arrow villains in the series, he's also one of the most ruthless. He even goes as far as to kill Oliver's only remaining biological parent - his mother, Moira.

Slade Wilson/Deathstroke Slade Wilson is not just the best Arrow villain, but he's also one of the show's best characters overall. His journey through Seasons 1 and 2 is one of the series' most tragic storylines, culminating in a brutal war between him and Oliver.

Episode Info With Lance still targeting the Arrow, Felicity insists that Oliver keep a low profile; a metahuman who uses blasts of energy and plasma to kill people terrorizes the city, forcing Ray and Oliver to team up.