Wiseguy Season 1 Episode 19

Blood Drive

With Herb becoming more insistent about their agenda, Roger schemes to get Mel to fund the military coup of Isle Pavot. Unfortunately, Mel is convinced that Cabra, the man Herb wants to put into power, has put a voodoo curse on him and orders Vinnie to find a woman who can remove the curse. Realizing that Mel is a major stumbling block to the mission, Roger sends him over the edge by smashing the crystal that contains Mel's soul. Despondent, Mel asks Susan to kill him, and she does. (source: http://www.plasticcow.com/wiseguy)