Who Is The Murderer In The Film Knives Out?

Got spoiled that it's not Marta? Still, how did Harlan Thrombey actually die, and why was Linda Drysdale so suspicious?
2026-03-29 10:27:08
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8 Answers

Best Answer
Talia
Talia
Spoiler Watcher Sales
Since the whole point of the movie is the mystery, I definitely won't spoil it! The reveal is a lot of fun though, especially how they pull it off. Speaking of clever setups, I've been reading a web novel called 'Murderer' that does something similar with the reader's expectations. The entire premise is that you know who the killer is from page one, and the real puzzle is watching the seemingly ordinary victim outsmart a literal ghost haunting him into confessing. It's a great twist on the genre where the 'how' becomes much more interesting than the 'who'.
2026-08-06 05:01:05
85
Ashton
Ashton
Story Finder Teacher
Oh wow, talking about 'Knives Out' gets me so excited! The murderer is actually Marta Cabrera, Harlan Thrombey's nurse. But here's the twist—she didn't do it intentionally. It's such a brilliantly crafted reveal because the film makes you think she's innocent at first, given her kindness and the fact she accidentally administered the wrong medication. The real kicker is how Ransom, Harlan's grandson, manipulated the entire situation, thinking he'd framed her perfectly. The way the layers unravel, with Marta's guilt and Ransom's arrogance clashing, is pure genius. I love how the movie plays with expectations, making you question every character's motives until the final puzzle piece snaps into place.

What really sticks with me is how Marta's inherent goodness becomes her 'alibi' in a way—her inability to lie without vomiting makes her the most trustworthy character in a house full of liars. The film's commentary on privilege and morality is sharp, too. Ransom's downfall is so satisfying because he underestimates Marta, just like the rest of the family does. The way director Rian Johnson subverts classic whodunit tropes while honoring them is just chef's kiss. I've rewatched it so many times just to catch all the subtle foreshadowing.
2026-04-01 21:27:56
22
Ruby
Ruby
Helpful Reader Analyst
The murderer in 'Knives Out' is Marta, but it's way more complicated than that. She accidentally gives Harlan the wrong dose because Ransom tampered with the medicine bottles. The brilliance of the plot is how it makes you sympathize with Marta—she's genuinely distraught—while Ransom's scheming unfolds in the background. That moment when Detective Blanc realizes Ransom's alibi doesn't add up? Pure satisfaction. The film's a love letter to Agatha Christie but with a modern, self-aware twist. Marta's victory feels earned, and Ransom's comeuppance is deliciously ironic. God, I love this movie.
2026-04-01 21:59:53
28
Yaretzi
Yaretzi
Contributor Teacher
Let me gush about 'Knives Out' for a sec—the killer reveal is such a rollercoaster! Technically, Marta's the one who 'kills' Harlan by mixing up his medications, but the real villain is Ransom. He's the mastermind who swapped the labels, thinking he'd inherit everything by framing Marta. What blows my mind is how the movie tricks you into rooting for Marta while making you doubt her, only to flip the script entirely. The scene where Blanc figures it out? Chills. The way he pieces together Ransom's smug 'eat shit' comment about the toxicology report is perfection.

And can we talk about Marta's arc? She starts as this quiet, overlooked caregiver and ends up outsmarting everyone. The family's entitlement versus her humility is such a juicy contrast. Even the visual clues—like the go board symbolizing the game Ransom's playing—are layered. I adore how the film balances humor with tension, like when Marta keeps barfing mid-lie. It's a murder mystery that's as clever as it is heartfelt, and that final shot of her sipping coffee from the 'My House, My Rules' mug? Iconic.
2026-04-04 00:13:15
9
LanePerry
LanePerry
Plot Detective Consultant
Honestly, the real fun of 'Knives Out' isn't the 'who' but the 'how.' The movie tells you who did it relatively early on, which was a genius subversion. The tension then shifts to whether Benoit Blanc will figure out the incredibly clever mechanism Marta accidentally set in motion. Watching her navigate the minefield of that toxic family while trying to keep her secret is way more compelling than a standard reveal in the last five minutes. It turns a plot about inheritance and murder into a deeply personal story about a good person in an impossible situation. The film's structure is its greatest trick, making you rethink what a murder mystery can be.
2026-08-03 14:58:51
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