ABC released 53 promotional episode stills for episode 3.01, Glass Houses. Of the 53, 14 of these pics have pics of Luke in clear view (a couple of them had Luke in the background but blurred out, which will not be included in this). Anyway, here are the pics for your perusal. As usual, they can be seen in the gallery by clicking below.
ETA: This season will introduce Mr. & Mr. Wandell-Walker!! :)