Ella Purnell’s Returning Serial Killer Series Is Switching Genres for Season 2
A New Threat Emerges
Sweetpea follows Rhiannon Lewis, played by Purnell, as an overlooked woman who becomes a serial killer. The first season paired crime drama with dark comedy, while asking viewers to follow a protagonist whose choices grow increasingly troubling.
The second season’s teaser pointed to Rhiannon embracing her double life. Its official trailer, however, introduces a copycat killer, shifting the story toward a mystery about who is behind the new crimes and why.
Rhiannon Faces Suspicion
Rhiannon believes she targets people who deserve to die, but AJ’s death complicates that justification. The copycat appears to operate by different rules, and the crimes could draw attention to Rhiannon if she is caught.
The trailer also suggests someone may know what Rhiannon has done, though it does not establish whether that person is the copycat. The uncertainty sets up a cat-and-mouse conflict as Rhiannon tries to trace the new murders and protect her secret.
Reporter And Killer
Rhiannon’s job as a junior reporter gives her a reason to pursue clues. At the same time, investigating the copycat while hiding her own crimes could put her in a difficult position.
People already in the series have seen Rhiannon’s darker side, and newcomers are also expected to enter the story. The added mystery builds on the first season’s premise while changing the balance of the drama.
Room For More Stories
Rhiannon has killed several people, including AJ after he learned the truth about her. The story suggests she may become more impulsive, rather than limiting her targets to people she considers evil.
The television adaptation differs in major ways from the original novel, though its broad storyline remains similar. The article says five seasons are possible, with one for each book, if the series continues to attract interest.
Key points
- Sweetpea’s second season introduces a copycat killer who may implicate Rhiannon.
- Purnell returns as Rhiannon Lewis, a serial killer and junior reporter.
- The show adds mystery to its existing dark comedy and crime drama.
- Season 2 premieres in the UK on November 26, 2026.