YES

All the purple at Hank and Marie's - I always interpreted that as a reference to the 'purple heart' - isn't that the American medal given to soldiers who are (bravely) injured or killed in the course of duty? Purple is associated with bravery in some poetry and literature too.

Jesse is the fly. Before he arrived the lab was pristine, ordered and clean. Things ran efficiently. Then Jesse arrived, contaminating the lab with his scruffiness and lack of respect for the expensive equipment, mucking around with the hose etc. Contaminates the coffee with sleeping pills and most significantly…