Another big name has signed on to accompany Castle to California.

As previously reported, Dominic Purcell and Jason George will both guest star on the upcoming episode that takes Castle and Beckett our west to look into a murder. TV Guide now confirms D.B. Sweeney will also appear on this installment.

The veteran actor, who appeared on a few episodes of The Event, will take on the role of Robbery Homicide Detective Kyle Seeger. He'll question Castle and Beckett about their rogue investigation.