Despite appearances this series actually fits into DC's canon by being set on Earth 16 (see Wikipedia entry). There's a new (black) Aqualad, Robin is 13 year old Dick Grayson,there's the Superboy clone, 13 year old Wally West as Kid Flash, Miss Martian, and (not in these episodes) the archer Artemis. The premise is that a bunch of kid sidekicks form a team which the Justice League decide to use for covert operations. It's also more than adventure of the week but ongoing storylines/subplots and the gradual revealing of the characters' secrets. This really is terrific stuff and is highly recommended.
Just don't buy it in this edition which only contains four episodes. I picked up a 3-pack of vols 1-3 for around nine pounds on a certain well known auction site. I then went on to buy a 2-disc set of the second half of Season 1 for about fifteen at the same place and also the first half of Season 2 for the same price. And wait till you see Season 2 which is set five years later and is even better. Fans of superheroes just can't do better in the animated format.
Young Justice isn't quite up to the standard of Justice League Unlimited. It lacks that show's Iron Age political consciousness. But truthfully, that's the absolute worst thing you could say of it.
Like all the best superhero cartoons, this show is as not just a series, but a serial. It's a show where a large scale story arcs are gradually built up over the course of a whole season - and indeed, not only within each season, but between the seasons. I say "like all the best", because that's the format that's always seemed best able to bring out the more adult side of the superhero genre. It not only allows for more sophisticated plot lines: It also allows for the gradual development of character, and the relationships between the characters, while still leaving plenty of space for the spectacular action sequences that all fans of the genre love.
I know this is a controversial topic among fans, but personally I like season two a little better than season one. However, due to the complex nature of this show, I would say that seeing season one first is an absolute must.
I'd give the show itself (and yes, specifically season 1) 5 stars no problem. However, I'm taking off a star due to the dodgy nature of the DVD release. This business of releasing shows in "volumes" rather than seasons is just so typical of the way things work in animation. Come on, Warner Bros.! You don't do this with your "grown up" shows!