Watch Blue Bloods [S5E19] : Through the Looking Glass Full Episode Online for Free in HD @ br br Air Date : September 26th, 2014 br Season Number : 5 br Episode Number : 19 br Episode Name : Through the Looking Glass br Networks : CBS br Genres : Crime, Drama br br Storyline: br Frank goes toe to toe with an investigative journalist who refuses to give up her source, despite the source admitting to committing murder. Also, Danny is paired with a troubled teenager as part of an NYPD program aimed at influencing youth to make better decisions.