Rizzoli & Isles' season four premiere airs tonight. The show was a cable summer powerhouse that slumped a bit during its winter run. Its season three finale, which bizarrely aired on Christmas, scored a 0.8 adults 18-49 rating as did its winter premiere on November 27, 2012. Its season 3 summer premiere on June 5, 2012 scored a 1.2 adults 18-49 rating and its summer finale on August 14, 2012 garnered a 1.3 adults 18-49 rating. So will it return to last summer's glory days, or was the winter decline permanent? Make your predictions!