Global is keeping things fresh this spring with the debut of three new prime-time series targeting the 18-to-49 demo. On Wednesdays, there’s the new cop dramedy, The Unusuals. On Thursdays, the modern whodunnit Harper’s Island debuts, and animated comedy Sit Down, Shut up joins Global’s Sunday evening cartoon lineup. All shows will also be available online at GlobalTV.com.

On Thursday, April 9 at 10 pm, the murder mystery Harper’s Island launches on TV. The 13-episode series is about friends and family who travel to the island for a destination wedding. Each episode someone is killed and the murderer will be revealed by the final episode on July 2.

Harper’s Island digital presence at GlobalTV.com lets murder mystery fans can do what they do best – ID the killer. In addition to streaming full show eps, interactive weekly victim polls and character bios help wanna-be-solvers sort out the plot. And at HarpersGlobe.com, a series extension unspools a storyline about a fictional journalist hired by the island’s paper to start an online community. The first of the 17 digital-only episodes launches next Wednesday, March 18, to spark interest pre-series launch.

On Wednesday, April 8, The Unusuals, starring Amber Tamblyn (of Sisterhood of Travelling Pants fame) and Adam Goldberg (of Entourage) who play New York homicide cops, debuts at 10 pm. The eight-episode show revolves around Tamblyn’s character, a new recruit to the NYPD homicide squad.

On Sunday, April 19 at 8:30 pm, Sit Down, Shut up is slotted between fan-favorite animated shows The Simpsons and Family Guy. From Arrested Development creator Mitch Hurwitz, Sit Down, Shut Up reunites Arrested stars Jason Bateman, Henry Winkler and Canadian Will Arnett in a comedy that takes place in a public school. The show is slated for a six-episode run.