“The Better Sister” ending explained: Who killed Adam — and why? Jessica Biel and Elizabeth Banks play sisters swept up in a murder investigation in the Amazon thriller.

Who Gets Arrested for Adam’s Murder in ‘The Better Sister’? Chloe manages to frame Bill Braddock (Matthew Modine) by planting the murder weapon in his home.

Adam Moran has to deal with everything from trolling to serious health risks. Here are the biggest struggles of the Beard Meats Food star's career so far.

Elizabeth Banks and Jessica Biel's new murder mystery show had a dramatic season finale, so let's break down what happened and who killed Adam.

'The Better Sister' co-creators on the twists in the Jessica Biel-Elizabeth Banks Prime Video mystery, and their hopes for a Season 2.

Adam Zimmer’s sister, Corri Zimmer White, shared an emotional message on Instagram after she revealed Tuesday that her brother died unexpectedly at the age of 38.

Jessica Biel and Elizabeth Banks mix it up as two sides of the same coin in this adaptation of Alafair Burke’s novel.

Related: Sister Wives ' Meri Brown Reveals Her Brother Adam Died at 54 — 5 Weeks After Stopping His Cancer Treatment “Now, I understand that it's not just me.

Marie Moran is headed to St. Cloud State, while sister Makayla Moran carries on a legacy with the Apple Valley Eagles.

Adam follows the titular awkward, self-conscious teen (Nicholas Alexander), who spends the summer with his hip and queer older sister Casey (Margaret Qualley) in New York City.

How does The Better Sister end? Who really killed Adam — and why? Read on as we answer these questions and more with our The Better Sister ending explainer. What is The Better Sister about?

The Better Sister Ending Explained: In the end, as many may have predicted, it was one of the two sisters who killed Adam as he had shown signs of abuse toward both Nicky and Chloe.