Doppelgänger/Tropes

* An Aesop:
** Letting go may be hard, but is important
** Don't hate people when they did nothing to deserve your hate.
** Just because somebody looks like a person you knew dosen't mean they are like them.
*Awesome Art: What else was to be expected from Flying Barkr Productions
* Creator's Oddball: This is Andy Murschietti's first animated film.
*Darker And Edgier: This is Sony Pictures Animation's first tap into the horror genre.
* Deconstruction: Of the Doppelgänger Gets the Same Sentiment trope. The film points out how weird and creepy is for an stranger to have a crush on you just because you look like somebody you've never met. It also showcases how terrifying it is for somebody to want to kill you because of what another person you resemble did, aswell as how unfair is to treat somebody badly for something they never did.
*Foreshadowing: At one point, the killer says "you are all alike", hinting at his motivations.
* Heartwarming Moments: While Tony does want to gain Alt!Florence's love, he neverthless resoects her boundaries.
* Nightmare Fuel: The mysterious killer turns out to be police commissioner David Clein, who wants to kill Tony because of what his counterpart, a dangerous criminal, did in life, and is convinced all Tonys are the same. Imagine somebody wanting to kill you because of what another person did, simply due to you looking like them.
**The scene at the front door is absolutely chilling. As the characters have a talk outside, the audience knows the killer is right there looking for them. But tye characters don't. This adds a sense of suspense and dread to an otherwise "normal" talk.
* The Multiverse: The film focuses on two different realities, and on how different alternative counterparts are from one another. Unlike most stories focusing on the Multiverse, its existence is common knowledge.
*Playing Against Type:
**This is one of Mark Hamill's few not-evil voice roles.
**Chris Evans may have plated Jerkasses, but never a horror movie villain.
*Relationship Voice Actor: David and Florence are voiced by Chris Evans and Scarlett Johansson AKA Captain America and Black Widow.
* Shadow Archetype: David represents in essence what Tony could gave become had he not accepted that no alternative counterpart is the same as another one.
* Shout-Out: Some shots featuring David bring to mind The Terminator.
*Tearjerker: At the end of the day, Tony is just a man in grief refusing to accept his wife is dead. Is hard to not to feel sorry for him.