Deceit

Bailey postpones Earth's destruction because he becomes attracted to Eve Bendibuckle and wants to have sexual relations with her before carrying out his mission to annihilate the planet. This decision reveals his alien nature as a 'sex fiend' who prioritizes personal desire over his duty to cleanse polluted worlds.

Earlier, Bailey declares he destroys polluted worlds, but his immediate attraction to Eve shows his weakness for human desires.

Brick arrives claiming to be an alien sent to Earth to destroy all humans and cleanse the planet, similar to Bailey's mission. However, he presents himself as Bailey's therapist, which leads Eve to suspect both may be escaped mental patients rather than actual extraterrestrials. The film never fully clarifies whether Brick is genuinely an alien or another layer of deception.

Brick's arrival immediately follows Eve's suspicion that Bailey might be a mental patient, adding ambiguity to both characters' true natures.

The Cube is a powerful object used by an intergalactic police officer who has possessed Wilma's body. This officer grants Earth a stay of execution, effectively postponing the planet's destruction. The Cube appears to be some kind of legal or bureaucratic tool within the alien judicial system that can override destruction orders.

The presence of an intergalactic police force is hinted at when Bailey and Brick discuss their missions, suggesting higher authorities exist.

An unnamed man commits suicide by drinking bleach, and immediately after his death, his body is possessed by Bailey, an alien who declares he destroys polluted worlds. The suicide serves as the catalyst that allows Bailey to take human form on Earth, using the dead man's body as a vessel for his mission.

The opening scene establishes that Bailey can only arrive by possessing a recently deceased human, setting up the body's importance throughout the film.

Eve shoots both Bailey and Brick in the vehicle during the climax. With the two alien destroyers dead and Earth's fate now resting in her hands, the film ends on an ambiguous note. The intergalactic police officer has already granted a stay of execution using The Cube, but whether Eve actually saves humanity or what choice she makes remains unresolved by the summary.

Eve's resistance to both aliens throughout the film builds toward her taking decisive action at the end.

An intergalactic police officer possesses Wilma's body, similar to how Bailey possessed the unknown man who committed suicide. This officer uses The Cube to grant Earth a stay of execution, intervening against Bailey and Brick's destruction plans. The mechanism of possession appears to be standard for aliens visiting Earth.

The film establishes early on that alien beings can possess human bodies after death, making Wilma's possession possible.

Both aliens attempt to seduce Eve, though for slightly different reasons. Bailey wants to have sexual relations with her before destroying Earth, while Brick's motivations are less clear but also involve attraction. Eve resists both attempts, making her refusal a key element of the conflict. This subplot drives much of the comedic tension.

Bailey's earlier decision to postpone destruction for sexual relations establishes his primary motivation regarding Eve.

The title 'Deceit' likely refers to the multiple layers of deception in the film: Bailey posing as a stranded traveler, Brick posing as a therapist, both aliens posing as potential romantic partners, and the ultimate deception of the alien invasion itself. The ambiguous ending also leaves viewers questioning what is truly happening.

The opening scene's mysterious suicide and possession sets up a narrative built on hidden identities and deception.