Even though I have never seen an episode of the show, I have been noticing over the past little while that studio's are doing more and more "Complete Series" releases at the beginning of the release for older shows, than waiting till all the seasons are out. Think of how many comments are on the internet saying "well, I'll wait till all the seasons are out", followed by how many TV shows have only received one or two seasons on DVD/Blu-Ray. I think it may be more of a business decision, release it all at once, and if there are any bonus features, have them as exclusives to the Complete Series, and then release bare-bones, or minimal bonuses on the individual season releases. Then that way, if the individual releases are not fully released, the studio's can then say "Hey, we released the entire series---it's out there!", instead of declining sales of the individual seasons leading to no Complete series in either individual seasons or a complete box set.
Look at what Fox did for Ally McBeal, Time-Life/Star Vista is now doing for China Beach --- shows that have a ton of music --- they release the complete series first, with bonuses exclusive to the box set, along with Season 1 on the same day, and then just release the following seasons. That way they are able to justify the high music cost, and put out a high-priced item, and then release lower-cost individual seasons for those who don't want to wait for the individual releases.
