This is the last volume in the series. For those of you still looking for episodes not in the numerical series, they may be on "More Treasures of the TZ" or "Tresures of the TZ" which were produced prior to Vol. 1.
While two of the episodes on this DVD are found elsewhere in the series, the other two are not. However, there are a couple of surprises on this disc which make it important to history buffs and die-hard fans. "A World of His Own" is one of my personal favorites. It has the most "unique" ending of any episode, as it should -- it was the final episode of the first season.