S P O I L E R S
I've mentioned this any number of times before, so forgive my redundancy, but the Leviathans episodes were the very first ones I got to watch regularly as a kid. Before that, I could only see the show sporadically (we didn't get cable in the house till 1969, which one needed to pick up the ABC channel that ran DS); certainly not enough to get any sense of what was really happening with the story. So as far as I was concerned at that age, the Leviathans, bad Barnabas, the walking dead, scary (unseen) monsters, and all such elements of the show were truly what DS was all about. I still have a lot of fondness for the story, especially Barnabas's renewed malevolence, which, looking at with the benefit of hindsight, was a desperately needed move. I really like Paul Stoddard's return, and even though I didn't know the backstory as a kid, even then his relationship with Carolyn hit me with some poignancy. Best of all, I was never so creeped out as by the heavy-breathing thing behind the Todd's upstairs door. They definitely made the right decision to not even attempt to show the critter.
Nowadays, the little feller that played Alexander creeps me out REAL bad.
While it certainly had its shortcomings, the Leviathans story hit some distinct high points, particularly the atmosphere of dark mystery in the early episodes. It's a shame it didn't play out to fulfill its potential, but I can't help but maintain an emotional attachment to that particular era of the show.
--M
http://home.triad.rr.com/smrainey