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"John Barrowman – Malcolm Merlyn (seasons 1–5)"

Arrow (TV series)
Arrow (TV series)
Arrow is an American superhero television series developed by Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg based on the DC Comics character Green Arrow, a costumed crime-fighter created by Mort Weisinger and George Papp, and is the first series of the Arrowverse, sharing continuity with other related television series. The series premiered in the United States on The CW on October 10, 2012
"John Barrowman – Malcolm Merlyn (seasons 1–5)"
"Emily Bett Rickards – Felicity Smoak (seasons 1–7)"
"David Ramsey – John Diggle (seasons 1–8)"
"Stephen Amell – Oliver Queen (seasons 1–8)"
"Katie Cassidy – Laurel Lance (seasons 1–4), Laurel Lance / Black Siren (Earth-2) (seasons 5–8)"
"Rick Gonzalez – Rene Ramirez (seasons 5–8)"
"Caity Lotz – Sara Lance (seasons 2–3)"
"Colin Donnell – Tommy Merlyn (season 1)"
"Colton Haynes – Roy Harper (seasons 1–3; 7)"
"Willa Holland – Thea Queen (seasons 1–6)"
"Paul Blackthorne – Detective Quentin Lance (seasons 1–6)"
"Josh Segarra – Adrian Chase (season 5)"