Task: Question Understanding
Input (English): Context : DVD Movie Guide's Colin Jacobson, who listed the episode as one of his favorites from season three, said that ``on the surface, 'Saturdays of Thunder' essentially just rehashes'' the theme of the previous episode, ``Lisa's Pony'', in which Homer tries to be a better father for Lisa. 
Question : Which series is Saturdays of Thunder a part of?
Output (English): series