There are two kinds of people in the world. The ones who are watching Homeland and the ones who are sick of people asking them if they are watching Homeland. I recently transitioned from being the former to being the latter. Now I'm hooked on two Showtime serieseseses. The other one being Dexter, of course.
The very brief Glenlivet appearance takes place about 19 minutes into the second episode from season one entitled "Grace". I had to enlarge a few screenshots from the episode in order to confirm that it was, in fact, a Glenlivet bottle. Hopefully there will be more sightings to come throughout the show.