Arrowverse Crossover: 11 Best Moments From Arrow's 100th Episode 'Invasion!'
3. Thea's Refusal To Go
I've already mentioned about the emotional weight of the episode, but the strongest thread in this regard comes from Thea. When everyone has realised what's going on and they need to find a way home, she accepts the truth of it, but also refuses to leave.
It leads to a oainful farewell between her and Oliver, who ultimately accepts her decision. It's hard, but she's going to stay in this new life (how exactly that would've worked I'm not sure on).
Then she reverses that decision, upon realising that if she isn't gonna lose her family again, then she needs to stick with Oliver. The pair's scenes have been some of the strongest over the past couple of years, with a really strong bond developing between the two, and this is a perfect example of their relationship.