Dragon Ball Z Season 4 was released last week, on February 19th. The entire fourth season, consisting of thirty-two episodes, is included on six discs.

Season 4 has been digitally remastered and restored, so it's clean and pretty.  The series has been re-dubbed with revised English dialogue, and the English voice track features the original Japanese music in stereo.
  Another English voice track features the US television broadcast music in stereo, and the Japanese voice track with the original music is in mono.  There's also a 'marathon feature' that allows the episodes to play straight through without having to stop for credits.  A handy insert booklet with character profiles of the heroes and villains, as well episode summaries is included.  Season 4 covers the Garlic Jr., Trunks, and Android sagas.