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In Arrow‘s first couple of episodes, Oliver meets John Diggle, his driver and bodyguard. Their relationship starts off rocky because Oliver prefers to work alone, but they grow closer as the seasons go on. Diggle becomes so important by the end of the Arrowverse that he deserves another shot in live-action.
John Diggle Makes the Most of His Opportunity in the Arrowverse

Being a military man, Diggle understands Oliver’s quest to make Star City better. He starts lending a hand here and there, covering for his boss when he disappears and offering advice. The Arrow villains get tougher and tougher, though, so Diggle starts being active in the field. He also uses his connections with A.R.G.U.S. to bring the Suicide Squad into the fold, which pays off when Deathstroke has the city bending to his will in Season 2. Unfortunately, it’s not all smooth sailing for Diggle, but his resilience in the face of insurmountable odds proves why he’s one of the best original DC characters.
One of Diggle’s toughest moments comes when he takes over for Oliver as the Green Arrow. He’s not at his best physically, so he starts relying on a drug that Ricardo Diaz is pushing on the streets. Oliver catches wind of his friend’s problem and confronts him. The two have a heated argument that sees them both say awful things. It doesn’t take them too long to patch things up, and after they do, they’re the Arrowverse’s best duo, beating any villain they come up against. Sadly, the battle with the Anti-Monitor during “Crisis on Infinite Earths” takes Oliver’s life, leaving Diggle heartbroken.
After Oliver’s death, Diggle struggles with his identity, especially because he comes into contact with a glowing green object that seems a lot like a Green Lantern ring. He doesn’t take the Guardians of the Universe up on their offer to become a galactic hero, which is a bit of a bummer. However, James Gunn’s DC Universe is preparing to take off, and there’s certainly room for a character as noble as Diggle on the flight.









