Arrowverse Crossover: 11 Best Moments From Arrow's 100th Episode 'Invasion!'
8. Green Diggle
The 100th episode spends some time exploring the relationship between Oliver and his father, and how it would've panned out had they not got on that boat.
Robert wants his son to take over QC when he steps away to become Mayor, but their business chat is interrupted by a mugger. While Oliver does his best to be the hero, they're saved in the end by the Hood.
It's an exciting moment, not least because we've no idea who this version of the Hood is. Malcolm Merlyn? Tommy?
Nope. As we'd soon discover, the man in the Arrowcave - and still assisted by Felicity - is none other than Diggle. It's a fun reveal, and allows David Ramsey and Stephen Amell to have some solid scenes together. It also makes sense, because no matter what timeline he's in, Diggle is always gonna be a soldier and have something he feels he needs to repent for.