The Domino Principle (1977) Timeline Explained – Every Event in Order

Tucker agrees because the organization promises him freedom and a chance to reunite with his wife Ellie. Despite his cellmate Spiventa's warnings that he's being groomed as an expendable hitman, Tucker cannot resist the opportunity to escape his life sentence and start over with Ellie.

Foreshadowing: Earlier, Spiventa warns Tucker that 'they' are grooming him for a dangerous job, which proves exactly true.

• Roy Tucker
• Ellie
• escape
• organization
• Spiventa warning

The domino principle refers to how a single order from a powerful figure triggers a chain reaction of events affecting countless lives. Tagge explains to Tucker that the original assassination order came from 'the man at the top,' and if he panics, 'the dominoes start to fall' - meaning the entire conspiracy will collapse and expose everyone involved.

• domino principle
• conspiracy
• chain reaction
• Tagge

Spiventa was never killed - the organization faked his death to manipulate Tucker. The body found was someone else, and authorities were told Spiventa had escaped to Canada. In reality, Spiventa was a long-time member of the organization, recruited in 1961, and was one of the additional shooters positioned at the assassination.

Foreshadowing: Spiventa's warning to Tucker about being 'groomed as an expendable hitman' makes more sense knowing Spiventa was already part of the organization.

• Oscar Spiventa
• fake death
• organization
• 1961

The organization kidnaps Ellie because Tucker tries to back out after realizing he's being asked to assassinate a politician. By taking Ellie hostage, they leverage his love for her against him, ensuring he carries out the job since he has no other leverage or escape options.

• Ellie
• kidnap
• threat
• assassination

Tagge reveals at Burbank Airport that Tucker's entire life since Vietnam has been engineered by the organization. They orchestrated his crime of passion (killing his wife's first husband), ensured he was caught and convicted, then recruited him when the time was right for the assassination. His entire relationship with Ellie and his path to this moment were predetermined.

• manipulation
• Vietnam
• decade
• conspiracy
• Tagge revelation

Tagge tells Tucker that the original order came from 'the man at the top' - a powerful figure running the country from the shadows. Tagge refuses to name this person, only saying that if he panics, the dominoes will start to fall. The movie never explicitly identifies this figure.

• assassination order
• man at top
• conspiracy
• Tagge

While flying away from Burbank Airport, Tucker spots someone planting a toolbox in Tagge's car. Unable to stop the takeoff, he watches helplessly as Tagge is blown up. The organization eliminates Tagge - likely to prevent him from exposing the conspiracy or because he had become a liability after helping Tucker escape.

• Tagge
• explosion
• car
• elimination
• organization

After returning to Costa Rica, Ellie is run into and killed by a passing truck. This tragic death represents the final destruction of Tucker's hope for a new life - the organization systematically dismantles everything they promised him, leaving him completely alone and broken.

• Ellie
• death
• truck
• Costa Rica
• destruction

Spiventa and Pine arrive in Costa Rica, and Tucker shoots both of them, dumping their bodies into the ocean. This is Tucker's act of revenge against the men who destroyed his life and killed his wife, though it leaves him completely isolated.

• Pine
• Spiventa
• killed
• revenge
• ocean

At Burbank Airport, Tucker tells Tagge that he deliberately fired short - intentionally missing - because he suspected there were other shooters. This confirms that someone else actually killed the target, and Tucker was expendable regardless.

• shooter
• missed shot
• target
• assassination

Schnaible is killed shortly after secretly meeting with Tucker in San Francisco. The organization eliminates him to prevent any investigation into Tucker's case or the conspiracy - Schnaible was Tucker's only legal connection to the outside world and could have uncovered the truth.

• Arnold Schnaible
• lawyer
• killed
• cover up

After the assassination and crash, Tucker takes Pine hostage at a hideout. He demands a plane and the return of his wife Ellie. This is Tucker's attempt to escape with Ellie and break free from the organization's control after completing their dirty work.

• Pine
• hostage
• plane
• escape
• Ellie

The summary does not name the specific politician who is the assassination target. What matters is that Tucker realizes he's being used to kill a political figure, and when he tries to withdraw, the organization responds by kidnapping Ellie to ensure his compliance.

• politician
• assassination
• target