Our homeless friend confronts you and questions you right off the bat.
"You touch any of my stuff?" - Chuck
I didn't take anything. - You lie to Chuck.
Who are you? - He notices you avoided the question.
I took the map of the train routes. - You tell Chuck the truth.
. . . - Chuck notices you don't answer his question.
Well now that you know Chuck, and know that for the moment is not a threat to the group you relax your guard and find out that he has already met the group. Any dialog with Chuck is non-altering so feel free to be... for lack of better phrasing--free.
This will be your last chance to chat it up with the group before we hit the rails. I suggest finding out a bit more about Chuck and how everyone likes him. Katjaa informs the group that Duck is getting much worse and Kenny while taken aback by it still holds onto some idea of faint hope. Get back to the throttle and give it a pull. This time we move on.
We'll see you on the open rails in 6.