Plenty of new television series need a season or two to sort themselves out, and as the second season reveals, A Town Called Eureka is still a work in progress--which is not a bad thing, considering that it’s one of the more provocative and ambitious shows out there. For the uninitiated, here’s the basic premise: Sheriff Jack Carter (Colin Ferguson), accompanied by his teenage daughter Zoe (Jordan Hinson), is stationed in Eureka, a picturesque little burg somewhere in the Pacific Northwest. Eureka is hardly Anytown, USA; indeed, this is the place where "the world’s greatest thinkers" live and work, most of them at Global Dynamics, "the most advanced scientific facility in the world." It’s also a place where exceedingly strange things happen on a regular basis. In Season Two, those happenings include people spontaneously combusting, becoming invisible, turning into gold, or simply disappearing (and leaving nothing behind--not even a memory that they ever existed); a "personal force field" that’s growing so large and so fast that it will soon engulf the whole town, and maybe even the whole world; freaky weather that changes by the moment; and even an experiment to re-create the Big Bang inside a Global Dynamics lab, leading to some unexpected side effects. These developments are all presented with enough cool special effects and scientific techno-babble to make A Town Called 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 A Town Called Eureka a but convoluted and hard to get a handle on, but this show is a keeper.--Sam Graham