Theorem

A mysterious, alluring figure whose presence disrupts the family's routines. He engages in sexual affairs with every member, offering tenderness and attention without seeking anything in return. His arrival exposes hidden desires and unsettles the moral order of the household.

A tormented patriarch who witnesses the stranger's influence. He gradually sheds material ties and, in a climactic gesture, strips at a railway station and wanders naked across Mount Etna, screaming in primal rage and despair. His journey marks the breakdown of bourgeois stability and the search for existential release.

The daughter forms a deep, intimate connection with the Visitor, losing her childish innocence about men. Her emotional awakening destabilizes the family dynamics and culminates in a catatonic state institutionalized outside the home. Her arc probes how desire can alter perception and selfhood.

The mother becomes sexually liberated through the Stranger's influence, seeking new encounters and fulfillment beyond domestic boundaries. Her transformation challenges traditional maternal roles and exposes the fragility of conventional morality. Her change emphasizes the film's critique of bourgeois propriety.

The devoutly religious maid experiences the Visitor's effect and is drawn into profound, paradoxical miracles. After a dramatic arc, she returns to her rural village and performs miracles, culminating in a ritual self-sacrifice that signals regeneration through suffering.

The son becomes an artist, forming an obsessive fixation on the Stranger and drawing his portrait repeatedly. He eventually leaves the family home to pursue art, embodying a rebellious move away from conventional family life toward personal creation.

One of the visitors in the household’s intimate web, his arrival further unsettles the family’s sense of loyalty and desire. He participates in the unfolding sexual dynamics that erode established boundaries.

Another companion in the Stranger’s constellation of relationships, his presence adds to the mosaic of desire that challenges the family’s repressed norms.

Acts as a herald, signaling the Stranger's arrival and its eventual departure. His presence links the mundane to the uncanny, emphasizing the story's fateful rhythm.

Part of the household staff, contributing to the texture of servitude and social dynamics that frame the central events. Her role helps illustrate the wider reach of the Visitor’s influence across the domestic sphere.

Uncredited role representing rural roots and the pull of traditional life away from the bourgeois milieu. Her presence contrasts with the urban sophistication of the estate.

A professional figure who appears in the tapestry of the household’s crisis, providing medical or moral commentary within the unfolding drama.

A minor character who embodies the ordinary world outside the estate’s walls, a reminder of everyday life intersecting with the extraordinary events inside.

An uncredited figure who hints at external commentary or inquiry about the events, underscoring the public gaze upon private turmoil.