Being a long-time comic fan I really enjoyed that episode. Beckett's reaction to Castle owning Avengers #1 was very cool!
I noticed the reporter at the crime scene right away because he the actor was on Jericho but I didn't pay much attention to the police woman letting Beckett and Castle into the crime scene.
I would also say that the guy getting split down the middle was a little over the top for me too but it didn't do anything to lessen my enjoyment of the episode. I was happy that they got back to their more light hearted formula of the show. Looing forward to next week's episode!