You go and find Thomas Edison to talk to and then he will give you a quest to talk to everyone!
first you have to get passed a guy at the end of the train
you have to figure out who stole the camera.
The porter is at the front of the train.
what to do after you pass the guards of Chicago and you get next to the snoring man on poptropica mystery train
lugeg on poptropica
find it
Stop playing Poptropica. Loser...
depends which stage
The Le Monde reporter is the mystery person.
its at the end
you don't have to
shoot him