My biggest pet peeve, with regards to crime shows: celebrity guest actors.

The moment you see the guest actor, you know he/she is the one who did it. Case in point: In this week’s “CSI,” Sarah and Catherine investigate the death of a woman (“woman A”) who adopted the embryo of another woman (“woman B”) so she could have a child. As soon as you see the mother of “woman B,” you know she did it, because she’s a well-known character actress.

In “Law & Order: Criminal Intent,” Michael Gross (aka Steven Keaton from “Family Ties”) guest starred as an art dealer. Of course, the moment you see him, you know he’s the killer because, well, why else would he be in “L&O”?

I wish the casting directors would realize that part of the fun for viewers is in trying to figure out who the killer is. As soon as you see a well-known actor on screen, you know exactly who did it, which takes away most of the fun.

So a note to all casting directors: Stop it!

And on a side note, why is Fox putting “Prison Break” on hiatus? It’s got huge ratings, and is one of the first big hits for Fox in a while. (And it stars Wentworth Miller, who, loyal readers will know, is my future husband ... Gee, I have a lot of future husbands, don't I?)

I know Fox wants to make room for “24,” but seriously, asking viewers to wait until May for new episodes is ridiculous.

How do these people get their jobs?!?