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David Cubitt has joined The CW comic-book drama as a crucial guest star.
Arrow is introducing another DC Comics character — and he'll have strong ties to Diggle.
Medium star David Cubitt, who played Detective Lee Scanlon on the CBS procedural, has landed a meaty guest role in The CW comic-book drama's third season as Mark Shaw, who becomes Manhunter, The Hollywood Reporter has learned. Cubitt is slated to appear in the third episode.