Years before Oliver Queen would become Green Arrow, he was inspired to take up archery by the amazing archer, "Merlyn the Magician". Once Green Arrow began to become famous, the two met again, as Merlyn challenged the hero to a public archery contest and defeated him. With that victory under his belt, Merlyn vanished for years, only to resurface as a member of the League of Assassins. Merlyn and Green Arrow faced again as Merlyn tried to fulfill a contract to assassinate Batman. Green Arrow was able to deflect one of Merlyn's arrows with an arrow of his own, saving Batman's life. Merlyn admitted that Green Arrow had become the better archer, but escaped before he could be captured. Unable to return to the League of Assassins, he became a freelance assassin.
Merlyn was apparently a part of the League of Assassins when the assassin David Cain's daughter, Cassandra, was born. Merlyn would seem to have taken part in the child's highly abusive training (along with other members of the League, such as Bronze Tiger), unknowingly giving her the skills to become the future Batgirl. He then served under Tobias Whale as a member of the 100.
He was among those who sold his soul to the demonic Neron during the events of Underworld Unleashed. He then joined the Killer Elite (along with Deadshot, Bolt, Chiller, and Deadline). All tried to perform various assassinations but were stopped by the Justice League of America. The group later encounters the Body Doubles. Merlyn and the others are soundly defeated, as the Body Doubles use gadgetry and cleavage to their advantage.
The villain next made an appearance in the pages of Young Justice as an archer working for the Zandian national Olympic team. He is the instructor to the young Zandian archer Turk (a half-wolf metahuman). Turk and Merlyn attempt to sabotage the games in their favor, but they are defeated by the Young Justice team.
Merlyn would next appear in the pages of Identity Crisis, and was one of the main voices for the villains during that miniseries. He recognizes the Monocle and Deadshot as his closest allies, and correctly predicts that the murder of Sue Dibny would have dire consequences in the villain community. When he is captured by the Justice League along with Deadshot and Monocle, Deadshot was able to use his ties to the Suicide Squad and Amanda Waller to secure their release (much to the frustration of the newest Manhunter).
The villainous archer reappeared with Monocle and Phobia in an attempt to kill the Shadow Thief at his trial, and in the process the villains found themselves battling Manhunter. Merlyn has since resurfaced in the pages of Green Arrow as part of a multipronged attack against Green Arrow and his family.
Afterwards, he appears to be under the employ of Talia al Ghul as a tutor to her son Damian Wayne, though he would later confess that he was learning more from Damian.
He was later captured by the vigilante Cupid, who planned to kill him in front of Green Arrow, whom she was besotted with. To this end, she slashed Merlyn's throat with an arrow. Green Arrow was able to get Merlyn medical attention in time to save his life, but the villain's throat was damaged to the point where he would never be able to speak again.
The New 52
Tommy Merlyn appeared in The New 52 (a reboot of the DC Comics universe) in Green Arrow #0. Five years ago, Tommy was Ollie Queen's best friend. During a hostage crisis on a Pacific Ocean oil rig with a villain named "Iron Eagle", Merlyn was caught in an explosion. Fast forward to the present day, Tommy, branded as the "Mystery Patient", awoke.
Merlyn appears in the Justice League Unlimited episode "Dead Reckoning". He is shown as a member of Grodd's Secret Society. He sides with Grodd in the mutiny against Lex Luthor. Merlyn is seen firing his arrows during the fight. While other mutineers are captured, Merlyn manages to escape.
A character named Vordigan, loosely based on Merlyn and referred to as "The Dark Archer" in advertising, appeared in the Smallville Season Nine episode "Disciple", reappearing later in the tenth season (episode "Prophecy") to kill Green Arrow. He is portrayed by Steve Bacic (Disciple) and by an unknown actor in (Prophecy).
It has been suggested that some content from this article or section be split into a separate article titled Malcolm Merlyn. (Discuss)
It has been suggested that some content from this article or section be split into a separate article titled Tommy Merlyn. (Discuss)
It has been suggested that some content from this article or section be split into a separate article titled Thea Queen. (Discuss)
In The CW's Arrow (2012–), Merlyn is the name of a family, a father, mother, son and a daughter (though a Queen by name) associated with the Queen family.
Thomas "Tommy" Merlyn (Colin Donnell) is introduced as the long-time best friend of Oliver Queen (Stephen Amell) who dates Laurel Lance (Katie Cassidy), Oliver's ex-girlfriend and son of Malcolm Merlyn. Later it is revealed that Thea, Oliver's sister, is actually Tommy's half-sister. Over the course of the first season Tommy starts off as a laid back and reckless playboy who with Oliver in their youth were involved in many social scandals. This recklessness of his continues until his father cuts off his funds forcing him to shape into a more responsible person, but this causes relations between him and his father to be further strained. It is later revealed that Tommy is estranged with his father after his mother's death, as Malcolm is fixated on his vendetta after he returned from Nanda Parbat; Oliver's father, Robert, acted as Tommy’s surrogate father until his death. For the majority of season 1 Tommy maintains a relationship with Laurel and he and Oliver continue to remain friends. However in "Dead to Rights" his father is shot by Deadshot and through this Tommy discovers that Oliver is The Arrow and begins to distance himself from his friend. Furthermore, out of envy Tommy breaks up with Laurel once he realizes that she still has strong feelings for Oliver. Relations between Tommy and Oliver become even more strained, until he discovers the plot of his father to destroy the Glades and is killed saving Laurel's life from a burning building. Oliver arrives too late, but the two reconcile as Tommy dies in his arms. In season 2 Tommy's death was the fueling factor for Oliver to change his ways and not kill anyone ever again. Tommy's death however sends Laurel into depression for most of the season until Oliver snaps her out of it. His death also makes Malcolm desperate to be involved in Thea's life. Tommy appears as one of three hallucinations in Oliver's mind in "Three Ghosts", encouraging Oliver to keep fighting when Oliver was suffering a crisis of confidence.
Malcolm Merlyn/The Dark Archer (John Barrowman) is the father of Tommy and Thea Queen and close friend of Robert and Moira Queen and the first season's main antagonist and is revealed to have trained as an archer in Nanda Parbat with the League of Assassins and was even the first person to leave the organisation. Fueled by the murder of his wife Rebecca during a mugging in the crime-infested area of Starling City called "the Glades", Malcolm plots with others to completely destroy the Glades. When Oliver Queen's father Robert tries to extricate himself from this plan, Malcolm has the Queen boat sabotaged, killing Robert and shipwrecking Oliver and his girlfriend Sara Lance, inadvertently causing the events that would shape them into The Arrow and The Canary vigilantes. Malcolm continues his plotting but when The Arrow begins to interfere with his plans, he takes measures by donning his League of Assassins uniform, taking the persona the "Dark Archer" who he uses to frame The Arrow for any targets Malcolm may kill. In the season one finale, "Sacrifice", Malcolm loses his fight with Oliver, but still activates an earthquake-causing device in an attempt to destroy the Glades, inadvertently killing his son Tommy, and appears to die. In the season 2 episode, "State Vs. Queen", Malcolm returns alive and is revealed that Thea Queen, Oliver's sister, was the product of an affair between himself and Moira after Malcolm's wife's death. It is later revealed that though Robert Queen was secretly aware of Malcolm's affair with his wife, he made no attempt to expose them out of his love for Moira and accepted their daughter as his own. It is implied that Moira's second husband, Walter Steele, is also learned of her past infidelity to Robert and Thea's true parentage at some point after his marriage to her. Malcolm tries to get Moira to tell the truth to Thea but instead she contacts Ra's al Ghul himself and informs him of Malcolm's survival which puts him on the run. Malcolm returns to Starling in "Streets of Fire" after hearing that Moira was killed by Slade Wilson and arrives in time to save Thea from one of Slade's minions. Malcolm desperately tries to convince Thea to go with him but in a moment of distraction with another one of Slade's minions Thea grabs a gun and shoots him. In the season finale episode "Unthinkable", he survived only having kevlar in his uniform, Thea left the city with Malcolm in the final scene. Barrowman is promoted to series regular in Season 3. 
Thea Queen (Willa Holland) is the daughter of Moira Queen and Malcolm Merlyn, though Malcolm being her father isn't revealed till season 2, the legal daughter of Robert Queen, the maternal younger half-sister of Oliver and the paternal younger half-sister of Tommy. In season 1 Thea is a reckless and immature drug addict who when she gets arrested for taking the drug "Vertigo" is sentenced to community service with Laurel and starts a relationship with Roy Harper (Colton Haynes). In season 2 she owns Oliver's club and is in a stable relationship with Roy but is irritated by his need to be a vigilante also like the Arrow. Over the course of the first season multiple secrets are kept from Thea from everyone she loves almost all of which she begins to learn of when Slade Wilson (Manu Bennett) abducts and tells her. She learns that her father is Malcolm and that Oliver and Moira knew, Roy was injected with Mirakuru and Oliver knew and finally Roy is The Arrow's sidekick which he kept from her. After all these lies she decides to leave her family and Starling City but is attacked by one of Slade's minions until Malcolm returns and saves her but she tries to shoot him but due to kevlar he survives. Later she decides to go with her father and leaves a goodbye note to Roy, possibly being renamed "Thea Merlyn". In season 3, he will turned his daughter into a villain. Holland hinted in a tweet that she'll become Speedy.
Rebecca Merlyn is the wife of Malcolm and the mother of Tommy and humanitarian who was dedicated to fixing a crime infested area of the city called "The Glades" but was murdered in a mugging in the Glades. Her death caused Malcolm to leave Starling, and Tommy, for two years and fueled his obsessive mission to destroy the entire Glades to avenge her memory. She is usually only mentioned but is heard via phone recording in "Sacrifice" when Malcolm plays the message she left whilst dying to Tommy. After her death, she became the step-mother of Thea Queen.