Returns: Wednesday, April 2, at 10 pm/ET (CBS) Number of new episodes: 7

Where we left off: Danny and Lindsay solved a case of a charred street racer, while Mac and Stella linked a restroom drowning to an imprisoned killer. What's next: "We're going to kick off with a bang," CSI creator Anthony E. Zuiker says. The first episode is the culmination of the Second Life Internet murder story that aired in October. The team gets a tip that gorgeous assassin Suspect X is lying dead in a warehouse. But is she? Relationship games: Jessalyn Gilsig ( Nip/Tuck, Heroes) arrives as a comely political player who catches Mac's eye. But the flame cools for lovebirds Lindsay and Danny. Under the microscope: The team is investigated when a higher authority takes an interest in their work. Stella has "an experience that will change her life forever," Zuiker says. Watch full episodes | Photos | More Returning Favorites coverage