The return of the Jekyll killer? Langston on a stretcher? A new video of Justin Bieber?!? And, according to the trailer, the new season of CSI  is just getting started.

The CBS procedural released a trailer Wednesday to flog its upcoming 11th season. Besides showing some minor spoilers, the video features the intriguing tagline, "Come for the murder, stay for the fun."

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And if that doesn't entice you, we repeat, there's video of singing sensation Bieber's upcoming appearance!