Castle: "Do I look like a killer to you?" "Yes, you kill my patience."

While I enjoyed Monday's Castle episode, I do want to ask one question: Did anyone else find the format almost too similar to the episode from last week? While last week the detectives found the murderer by looking at the victim's artwork, this week the victim led the detectives to her killer through her music. I hope this isn't a reoccurring theme that becomes predictable during the next few episodes. I love this show, but I'd love it even more if they would shake it up a bit.