: Titled "'Til Death Do Us Part," where the protagonists attempt to protect Bristol Cove from Tia's mermaid army.

Several other series have an eighth episode in their third season with the same or a very similar title:

In this episode, a prize-winning scientist is murdered on the grounds of the . The investigation quickly becomes personal for the detective, Phryne Fisher , when a killer who has traveled halfway across the world catches up with a member of her family—specifically, her father, Baron Fisher . Phryne must race against the clock to save him from a vengeful assassin while also helping to restore a fractured marriage. Subplots and Key Moments