I have this one up over at Saturday Morning Archives, and have for a while. You'll know why in a sec.
From season 4 of Dragnet (2nd series):
Joe Friday (Jack Webb) is taking a night school course, but even being a cop doesn't protect him from rules & regulations, especially when it comes to a druggie also in class. Shannon Farnon, better known for her voice work later in the 70's (i.e. Super Friends) is a classmate and prospective love interest for Friday.