- Scott Pearson: [talking confidentially] I'm under strict orders to remain undercover, but ever since I came aboard this ship...
- [He stops when he hears a young couple walking by]
- Charlie Chan: [after they are out of earshot] Yes...
- Scott Pearson: Since I've been aboard, two attempts have been made to kill me.
- Charlie Chan: You work for government?
- Jimmy Chan: Say, I got the doctor's fingerprints from the doorknob, but I couldn't find anything on the murder weapon.
- Charlie Chan: Many persons have handled that knife since killer.
- Jimmy Chan: But, Pop, all modern detectives take fingerprints.
- Charlie Chan: No. Only old-fashioned criminals leave such evidence behind.
- Scott Pearson: I'm sorry to bring you out on such a beastly night.
- Charlie Chan: Problems rarely wait for clearing weather.
- Charlie Chan: Tiger going away from village is never feared. Unfortunate agent's murder is proof he was approaching prey.
- Chattanooga Brown: I'm tellin' yuh, he's as guilty as a weasel in a hen house.
- Jimmy Chan: Well, Pop'll grab him if he is.
- Chattanooga Brown: Well, he's gotta bankroll that'd choke a water buffalo.
- Jimmy Chan: [Chuckles] Why not a mule?
- Chattanooga Brown: Ain't no mules where he come from. He come from, uh... He one of them shoemaker men.
- Jimmy Chan: A what?
- Chattanooga Brown: Shoemaker on... on the islands, you know!
- Jimmy Chan: Oh, you mean Jamaica.
- P.T. Burke: I always say "Watch these quiet ones." By jiminy, you never know who'll toss a knife into you these days, but leave it to a big detective to figure fast. Like I always say, "You pick the most innocent looking one, you got the killer." And, believe me, a dame can hide a knife like nobody's business.