Arrowverse Crossover: 11 Best Moments From Arrow's 100th Episode 'Invasion!'
2. Deathstroke
We already knew that Deathstroke was going to be returning to the episode in some capacity, thanks to Stephen Amell's Instagram account. What we didn't know is exactly how that'd play out.
Sadly there's no return for Manu Bennett, but it's still an utter thrill when Deathstroke first rears his two-tone head.
Just his presence is enough to cause excitement, and even if it's not quite Season 2 level, it's fantastic to see him going up against Oliver and Diggle in a 2-on-1 fight.
Even better is when Sara arrives on the scene, and proceeds to kill him in a mirror of the way he murdered Moira. No doubt had Bennett been available it would've been even better, but this alone was a great homage, and thankfully not the last we saw of him either.