advertisement Walter Fletcher: [after Chan has checked the radium in the bank safe] Mr. Chan, surely you didn't expect to find anything wrong? Charlie Chan: In my business always expect to find something wrong... Paula Webb: [as Chan leaves Ned and Paula in the restaurant] Must you go, Mr. Chan? Charlie Chan: Oh, quite necessary. Besides, much better for you to have dinner with young detective than with old detective. Charlie Chan: [annoyed that Tommy is still sitting down] Rising generation sit too much! Charlie Chan: [to Tommy and Birmingham] You remain here till I find doghouse to hold both of you. Charlie Chan: Ancient ancestor once say even wise man cannot fathom depth of woman's smile. Tommy Chan: People always get in trouble for talking too much. Charlie Chan: Be sure you remember that. Charlie Chan: Cannot sell bearskin before shooting bear. Charlie Chan: Mice will never play so long as cat is in house. Bradford Harris: [annoyed] Visitors are supposed to be announced first! Charlie Chan: [sarcastically] Sorry, police do not read Emily Post. Tommy Chan: [trapped in a cave-in as Charlie taps Morse Code] Do you think you'll get through, Pop? Charlie Chan: If not, Number Three Son and father will join honorable ancestors. Birmingham Brown: Mr. Chan, tell your ancestors to move over and make room for me. Bradford Harris: [noticing Stewart who has come through a secret door] Where did you come from? I didn't see you come in? Charlie Chan: [laconically] You can see us all go out. Charlie Chan: Skeleton key please! Police Inspector Harry Davis: This is strictly illegal. Charlie Chan: Four murders much more illegal!