Charlie Chan in Panama

Miss Finch is revealed to be Reiner, the spy mastermind behind the sabotage plot. She exposes her own identity when Chan corners the suspects at the Main Power Plant, attempting to escape death before being arrested. Her true identity as Reiner explains why she was at the center of the investigation and why she was so eager to prevent the group from discovering the truth.

Earlier, Miss Finch blunders onto the scene at the Manolo tomb, which raises questions about her true intentions and why she was there.

Chan pieces together the clues by sequestering all the suspects at the Main Power Plant and pressuring them individually. He coerces Miss Finch into revealing her true identity as Reiner by creating a tense standoff where she attempts to escape but is ultimately captured and arrested.

Godley is murdered to prevent him from identifying Reiner. As the government agent who recruited Chan to unmask the spy, Godley posed a direct threat to the sabotage operation. The killer aboard the seaplane, among the suspects, used a poison-tipped cigarette to silence him before he could reveal what he knew.

Godley's arrival in Panama City with the suspect group signals that danger is imminent, and his knowledge of Reiner makes him a target.

Jimmy Chan hurls a porcelain tobacco container at a gun-wielding figure peering through the door, breaking it and revealing a hidden map inside. The map points to the Manolo family tomb, which has been converted into a modern spy hideout. This discovery connects the suspects to the sabotage plot and leads Chan to the underground operations.

The porcelain container in Compton's room initially seems ordinary, but its fragility and value hint at something hidden within.

The movie never definitively reveals who shot Manolo. During the graveyard pursuit after he is released from the tomb, Manolo is shot dead. Neither Chan, Jimmy, nor Captain Lewis admits firing the shot, leaving his killer unknown. This ambiguity adds a lingering question to the resolution.

Reiner plans to blow up the Miraflores locks at ten PM using nitro delivered in a disguised water cooler to the Main Power Plant. The explosion would destroy a section of the Panama Canal and strand a Navy fleet that had completed Atlantic maneuvers and needed to pass through to the Pacific.

The seaplane arrival with dangerous suspects signals that sabotage of the canal is imminent.

Chan reveals in the final moments that he had already defused the explosive device before the confrontation at the plant. This prevents the catastrophe at the eleventh hour, allowing the fleet to sail safely through the locks after Reiner is arrested.

Jimmy Chan is arrested for taking pictures without authorization, which draws attention to his activities. While being held, he reveals details about his father Charlie Chan's true identity. He is later found hiding under the bed in Cliveden Compton's hotel room, raising questions about what he knows.

Kathi Lenesch is a refugee who fled Czechoslovakia after the Nazi takeover. She pleads with Chan not to reveal her passportless status, as she fears being returned to Europe. Her presence adds another layer of suspicion to the hotel group, though she is ultimately not connected to the sabotage plot.

Cliveden Compton is found dead in his hotel room closet, fatally shot. He was undercover for the British Secret Service, not involved in the sabotage plot. His body is discovered by Chan and Jimmy during their search of the room after the tobacco container reveals the map to the Manolo tomb.

The map hidden in his room suggests he was investigating the spy operation before being eliminated.

Charlie Chan assumes the identity of a U.S. government employee to go undercover and infiltrate the spy ring without alerting Reiner. This ruse allows him to investigate the suspects and get close to the sabotage operation without the killers knowing the famous detective was on their trail.