The title says it all about the episode. The smoke screen is an expensive cigar butt found at the crime scene after Marge Crandall is murdered. At first Lucas and Micah think the traveling salesman in town committed the murder. Later Lucas learns that Mark smoked the cigar. This at first exonerates the salesman until he reveals what was inside Marge's change purse. The smoke screen is gone and the guilty is arrested.
The end scene is interesting. Seeing that Mark feels better after smoking the cigar, Lucas offers him another cigar. Mark refuses saying he has sworn off smoking forever. Lucas realizes the after effects of youthful smoking was enough punishment for Mark.
The end scene is interesting. Seeing that Mark feels better after smoking the cigar, Lucas offers him another cigar. Mark refuses saying he has sworn off smoking forever. Lucas realizes the after effects of youthful smoking was enough punishment for Mark.