These developments are all presented with enough cool special effects and scientific techno-babble to make Eureka a perfectly viable and sometimes quite dramatic science fiction diversion. But there's more--much more. Sometimes this is a show about relationships: Jack and Zoe (custody becomes an issue when Jack's ex, played by Olivia D'Abo, shows up in the early episodes); Jack and Allison Blake (Salli Richardson), Global Dynamics' new boss (their growing attraction is complicated by the continued presence of her ex, a genius scientist type); Jack and his pal Henry (Joe Morton), who blames Jack for his girlfriend's death but gradually learns there's more to it than that. Much of the time it's a comedy, heavy on the quirks; and, in a change from the first year, it's also a serial, with several story arcs continuing over the course of the season. All of that can make Eureka a but convoluted and hard to get a handle on, but this show is a keeper. Extensive bonus features include deleted scenes, gag reels, podcast commentaries, and a good deal more. --Sam Graham