Dalton was supposed to head the cyber unit in Washington, D.C., but the position was taken away from him after a falling-out, the details of which are classified, according to TVLine.
The CSI spin-off will focus on a team that investigates crimes that begin online but have real-world repercussions. Perry joins a cast that includes Arquette, James Van der Beek, Peter MacNicol and Bow Wow.
Are you looking forward to meeting Perry's new character?
On the Set: Word play with the cast of NCIS: New Orleans: