I actually have never heard of Thieves' World. Sanctuary was a show on Syfy about a secret organization called the Sanctuary. *show spoilers*

They delt with "abnormals," which were anything from mermaids, to aliens, to hybrids, to the "real" Jack the Ripper. (not necessarily a show for all ages.) The main character, Helen Magnus, who used to play on Stargate, was born in Victorian times. She was a scientist, and along with a couple others (a few including Nicholus Tesla,,who turned out to be a fullfledged vampire, and the "real" Sherlock Holmes) infused themselves with vampire blood, therefore each gaining special abilities. They all aged VERY slowly (so they all just look like middle-aged people in the show). Helen became super intelligent, another guy can teleport, Tesla became a full vampire, and I can't remember Holmes' cause he died early on in the show. The only main character out of that particular bunch though, was Helen. The rest came in every so often. Something that reminded of futuristic was Hollow Earth, where most abnormals come from. The other characters are Will (Helen's assistant), Henry (tech guy who's also HYP (hyper excelerated person or werewolf), Ashley (Helen's daughter who dies), and Kate (a girl who comes in later).

*end of spoiler* The whole show sounds weird, but it was actually really cool! Again, not always *ahem appropriate ahem* conduct or language, but overall, cool!

I'm really bad at making decisions so someone should just say which one they think is best... I'd sort of like to do something with aliens that look like humans or whatever, sort of like I Am Number Four or The Host.