CSI's D.B. Russell will shake up the chain of command when arrives on CSI: Cyber this fall.

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The end is nigh for the Las Vegas chapter of the procedural juggernaut, but that doesn't mean viewers will have to say goodbye to all their favorite characters. Russell will survive, this time as the director of the division of Next Generation Cyber Forensics.

Unfortunately for Cyber's Avery Ryan, Russell's arrival will leave her questioning her own position.

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"[Russell] joins Avery and her team as they track down the most dangerous cyber criminals, beginning with the hacking of a home security system that turns into a homicide investigation," CBS teased in regards to the season 2 premiere episode. "Also, Avery considers moving to a new position within the hierarchy of the FBI, Krumitz is a witness in his sister's trial, Elijah deals with a delicate family situation and more is revealed about both Nelson's and Raven's backgrounds."

Avery may take this chance to take over Simon Sifter's job.

"She has an opportunity to take his job, but it's not something she quickly embraces," executive producer Pam Veasey informed TV Guide. "It means different things for her job. She sees that Sifter's job involved a lot of dealing with the brass and the politics of cyber."

Reunite with the Cyber team when the series returns to CBS on Oct. 4 at 10 p.m. ET. Click the video below to see a preview for the series' season 1 finale.

Tags: CSI: Cyber television CBS