TV One's Unsung, a modern day version of Behind the Music that often focuses on lesser known R&B/hip-hop/dance acts, is among the most captivating and well-constructed shows of its kind. It is consistently peak-Behind the Music levels of excellent. Case in point was last night's particularly inspired episode about Houston-based gangsta rap pioneers the Geto Boys, who are best known for their classic 1991 single "Mind Playing Tricks on Me."