Memento — Ending Explained

The central twist of "Memento" is the revelation that Leonard is not a reliable narrator and has been actively manipulating his own investigation. The final confrontation with Teddy, which occurs at the chronological beginning of the color timeline, reframes the entire film.

Teddy reveals several key truths: First, he was the lead police officer on Leonard's case. Second, he helped Leonard find and kill the real second attacker over a year ago. Leonard has a faded Polaroid of himself, smiling and pointing to a spot on his chest, commemorating the moment before he got a tattoo celebrating the successful revenge, which he then chose to forget. Third, and most devastatingly, the story of Sammy Jankis is a confabulation. Teddy claims Sammy was a real fraud Leonard investigated, but he was unmarried. The story of the wife with diabetes who died from repeated insulin injections is actually Leonard's own. His wife survived the attack, but became distraught over Leonard's condition and tested him, leading to her accidental death at his hands.

Faced with this unbearable truth—that his wife's death was a tragic accident of his own making and that his quest for revenge is a meaningless charade—Leonard makes a conscious choice. He burns the photograph of his successful revenge and the photo of Jimmy Grantz's body. He then decides to create a new purpose for himself. He takes out his notepad and on the back of Teddy's picture, he writes, "Don't believe his lies." He then jots down Teddy's license plate number, identifying it as the killer's, and drives off to get it tattooed. He chooses to make Teddy his next "John G," deliberately setting his future self on a path to murder him. The film's opening scene, where Leonard kills Teddy, is the direct result of this choice. Leonard is trapped in a loop not just by his condition, but by his own need for a reality he can live with, even if it is a lie. His 'system' is not a tool for finding truth, but for creating it.

The brilliance of "Memento" lies in its ambiguity, which has led to several compelling alternative interpretations, primarily revolving around the information provided by Teddy.

Interpretation 1: Teddy is Telling the Truth.
This is the most widely accepted reading. In this view, Leonard's wife survived the initial attack but was diabetic. Depressed by Leonard's condition and perhaps doubting its authenticity, she tested him by having him repeatedly administer her insulin shots, leading to her accidental death at his hands. To cope, Leonard suppressed this memory and created the story of Sammy Jankis, projecting his own tragedy onto a former insurance case. Teddy, the original cop, helped him find and kill the actual attacker a year ago. Since then, Teddy has been using Leonard's quest to eliminate other criminals. Leonard's decision to target Teddy is a conscious act of self-deception to create a new purpose.

Interpretation 2: Leonard's Original Story is True.
In this interpretation, everything Leonard believes at the start is correct. His wife was killed in the attack, there was a second attacker, and Teddy is a manipulative liar trying to throw him off the scent and use him. When Teddy tells Leonard the 'truth' at the end, it is simply the ultimate lie designed to save his own skin and confuse Leonard. The story of Sammy Jankis is just as Leonard tells it. This reading positions Leonard as a more traditional tragic hero, whose system is ultimately undermined by a cunning villain rather than his own psychological needs.

Interpretation 3: Sammy Jankis is a Complete Fabrication.
A variation on the first interpretation suggests that while Leonard's wife did die from the insulin overdose, Sammy Jankis may never have existed at all. He could be a complete construct of Leonard's mind, a necessary fiction to house the traumatic memory of his wife's death. Teddy's claim that Sammy was a real 'conman' could just be another manipulation, something he knows will resonate with Leonard's past as an investigator.