3 Theories About That Puzzling Flash-Forward on Netflix's Firefly Lane

In the final episode, Kate and Tully decide to go into business together with Kate as Tully's new producer. Though Kate seems skeptical at first, Tully convinces her it will be great before proclaiming, "Firefly Lane girls forever!" Of course, that didn't actually end up being true, so perhaps Tully wronged Kate along the way. Even though they've always been best friends, they've also always had conflict. Something tells us that working together (again) might not be the best thing for their relationship.