When Dexter opens the shoebox with photos, the first photo he looks at of him and Camilla (Margo Martindale) is actually a very young Michael C Hall and Margo, and not Devon Graye, who plays teenage Dexter!
The white board with the information about 'the skinner' is clearly seen in LaGuerta's office when Ellen and Miguel discuss Albert Chung's surrender.
Anton (Debra's quasi-CI boyfriend) has an apartment painted in a jarring combination of orange and shades of blue that often appeals to persons with red-green color vision deficiency (CVD). These colors are either an uncommented story point showing that Anton or a previous tenant had CVD, or a production designer or set dresser with CVD chose the color scheme.
The double-decker driving range scene was actually shot at Rio Hondo Golf Club located in Downey, California.
Jimmy Smits is right-handed, as evidenced in other performances, but he is playing golf left-handed in this episode. This was likely done so he and Dexter could face each other at the driving range.