I know jazz was reduced to as a background character in the 3rd season. I know his voice actor died or something. i know he made several appearnces in the background in season what episode did he appear in thoug. i know he appeared in Five Faces Of Darkness Part1, Five Faces Of Darkness Part 5 On cybertron fighting the decepticons then appeared frozen late rint hat episode. i think he appeared in the background of Dark Awakening miscolored though. He also appeared int he background in call of the primitives with bumble bee behind kup when tornatron attacked cybertron. let me know if i missed any episodes of where he appeared in. I love jazz he is a sweet autobot.