Watching episode seven, it seems like Kate and Anthony will never find a way to be together and wed. But when Kate falls from her horse and suffers a brain injury, it helps cast their situation in a new light, which ultimately leads to their happy ending.
Austen has also used falls and concussions as a plot device. In "Persuasion," it's not the romantic lead, Anne Elliot, who suffers a fall, but her friend Louisa Musgrove. Before her concussion and recovery, Louisa had her heart set on Captain Frederick Wentworth, who Anne secretly pined for. After her recovery, Louisa moves on from him, allowing Anne to seek her happy ending.