Murder on a Honeymoon

A sharp, witty detective fellow passenger who quickly suspects poisoning and forces the investigation to take shape. She uses keen observation, bold moves, and audacious ideas—like seizing clues from the mail and eavesdropping on conversations—to illuminate the truth. Her persistence keeps the case from slipping into a convenient but false narrative.

A trusted New York inspector who flies to Catalina to assist Withers and safeguard her from mob retaliation. He brings professional experience, a steadier approach, and practical questions that push the investigation forward. His collaboration with Withers helps connect the dots when suspects try to mislead them.

A gangster who has a price on his head and is entwined in the murder plot as a potential victim and target. He registers at the hotel under an alias, creating confusion and a motive for multiple parties. His true involvement becomes clearer as the investigation unfolds, revealing the deeper schemes at play.

Forrest's bodyguard who is killed early on, later revealed to have swapped identities with Forrest. His death sets off a chain of revelations about disguises and the true target of the plot. He embodies the danger that lurks behind every trusted ally in a high-stakes conspiracy.

A gangster who orchestrates murders to collect rewards and manipulate outcomes. He registers under an alias, confronts Withers, and ultimately dies when his plan unravels. His dual role as mastermind and insider drives the suspense and twists of the plot.

The widow of Marvin Deving who becomes entangled in the murder scheme. She triggers tense moments with a cigarette, and she participates in the scheme that eventually leads to McArthur's downfall. Her actions reflect the danger and volatility of those drawn into the criminal plot.

Kay Deving's husband, whose information is sought by investigators and who is killed before he can reveal crucial details. His death underscores the deadly stakes of the conspiracy and the escalating violence of the pursuit for reward and control.