Lost and Person of Interest alum Michael Emerson has joined Arrow for Season 6.

Michael Emerson.

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The CW announced at Comic-Con 2017 that Emerson has been cast in an unspecified, recurring role in the new season.Emerson is known for his roles as the enigmatic Benjamin Linus in Lost and the high-tech billionaire Harold Finch in Person of Interest.The CW also confirmed that David Nykl will reprise his role as Oliver Queen's friend, mentor and nemesis Anatoly Knyazev in the sixth season.Arrow: Season 6 will premiere at 9 p.m. ET/PT on October 12 on The CW. For IGN's thoughts on Season 5, read our reviews of the finale and the entire season

Alex Gilyadov is a freelance writer for IGN. You can follow him on Twitter.