Soundtracks: Songs that Defined History This new installment recalls the benefit concerts and musical tributes that followed in the wake of Hurricane Katrina in 2005. 7 and 10 p.m. CNN
Supernatural The drama ends its 12th season with back-to-back new episodes; Jared Padalecki and Jensen Ackles star. 8 and 9 p.m. KTLA
Grey’s Anatomy A dangerous patient has the hospital staff on edge in the medical drama’s season finale; with Ellen Pompeo, Chandra Wilson and Kevin McKidd. 8 p.m. ABC
MasterChef Junior Martha Stewart and chef Wolfgang Puck will be on hand to help decide the winner in the...