Eureka 9 p.m., Syfy
Now that Sci Fi is officially Syfy, the world is different. You can feel it, right? Everything just seems more . . . “y’’-ey. Tonight, “Eureka’’ returns to the rebranded channel for 10 new episodes, following Sheriff Jack Carter and the doings in a Northern California town populated by scary-brilliant scientific minds. Is Carter being replaced by a cyborg?
Whale Wars 9 p.m., Animal Planet
The Sea Shepherds on the Steve Irwin are quarantined in Hobart. Translation: The conservationists on the vessel named after the late wildlife expert are waiting to find out if they’ve been exposed to anthrax. This docu-series, in which the Sea Shepherds work to save the whales amid interpersonal pressures, is one of Animal Planet’s most popular shows.
Ghost Adventures 9 p.m., Travel Channel
Hiking the rain forest with Hamlet’s dad.
Dog Whisperer 8 p.m., National Geographic
Cesar’s toughest cases. They’re rough, rough, rough going.
Are You Smarter Than a 5th Grader 8 p.m., Channel 25
Larry the Cable Guy. It’s too easy.
Saturday Night Fever 7:30 p.m., WEtv
Simon Cowell is remaking. Will Susan Boyle sing “Stayin’ Alive’’?
Curb Your Enthusiasm marathon 8 p.m.-1 a.m., HBO Signature
Season one.
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