Nicholson was originally tapped for a 3-episode arc, which will begin airing next week. CBS had said it would add a new female regular cast member this season following the departure of original co-star A.J. Cook. The character Alias alumna Nichols will play, FBI cadet Ashley Seaver, had been originally listed as a new regular but was eventually scaled back to 3 episodes. Seaver will first join the Behavior Analysis Unit when she is invited by Agent Hotch (Thomas Gibson) to consult on a case after learning her family history will bring a unique insight into the mind of a serial killer.
Source: deadline
