I curse the day I picked up that Treeline 100 shows set - it opened a Pandora's Box of old TV. I really cant wait to get ahold of the Dangerous Assingment sets.
Also - if youre looking for pretty good sets of PD material, I recommend picking up the 1950's TV's Greatest Shows (there 4 sets - Greatest Shows, Greatest Detectives, Greatest Westerns and Greatest Comedys). The shocker is - they actualy did some restoration to the sets (Check out the results
HERE) so the shows look pretty good. It's a bit more - about 15-20 bucks for 3 discs - about 12 shows all in all.
I did get some of the Alpha Racket Squad, but I havent had time to watch more than one or two episodes. I've got Public Defender in my DDD wishlist, ready to go - but I'll have to look into those other shows you mentioned.
If they're cheap like the rest of the PD releases seem to be, I'll happly blind buy them. Classic TV rocks.