Dark City

A slick operator running an illegal gambling joint who pays for police protection. He is charming and willing to take big risks, balancing affection for Fran with a reluctance to commit. His scheming circle pulls him into a dangerous chain of events that spirals toward violence, especially as he tries to safeguard himself in Las Vegas as a blackjack dealer.

A singer drawn into Danny's dangerous world, using her charm while trying to stay out of harm's way. She questions Danny's true identity and loyalties as the drama unfolds. After learning the truth, she decides to leave for Chicago to preserve her career and escape the danger.

Widow of Arthur Winant who holds the key to the life-insurance beneficiary, and who destroyed photos of Sidney. She resists taking money from Danny and remains wary of the men pursuing her. She later serves as a protective, calculating figure in the criminal web, sending warnings to Fran.

A Los Angeles businessman in town to buy equipment for a sports club, whose suicide after a gambling dispute triggers the danger that drives the plot. His wealth becomes entangled with the poker game and his actions set off a chain of consequences for those around him.

A dangerous criminal whose pursuit of vengeance against those involved in his brother's death propels the narrative. His schemes and intimidation heighten the stakes and incite fear. He is eventually confronted by Garvey's men in a confrontation that brings the plot toward its climax.

Danny's ally who works in the casino world and helps run the group’s schemes. He arranges a Las Vegas opportunity for Danny and a singer job for Fran, keeping the operation afloat. His practical attitude grounds the group as danger grows.

The nervous member of Danny's circle who grows paranoid that someone is following him. He proves highly jittery and is ultimately killed, illustrating the brutal consequences of the group's illegal gambles.

A cautious member of the poker crew who helps facilitate the game but meets his own end as the web of crime tightens. He supports Danny until the escalating danger becomes too much to handle.

The city police captain who investigates the case, realizes the link between Winant's death and the poker game, and ultimately helps to steer Danny toward safety. He represents a measure of justice within the noir underworld.