Sad to say, CSI hit an all-time low for the series in my opinion.
First, when you have a guest star as famous as Roger Daltry and build an hour around his masquerading as different characters based on famous serial killers from slasher movies, you better get quality make-up that can really hide his face WITHOUT IT LOOKING LIKE MAKE-UP. I wasn't fooled for one second with ANY of the disguises he wore. Maybe on standard definition TV, the make-up wasn't obvious, but HD gave the game away VERY early.
And Roger's performance was terrible. He tried using a gravelly voice in an attempt to hide his British accent. Then, the gravelly voice fell away, and one started noticing words here and there that had British accents to them. By the last scene, he wasn't even attempting to disguise his voice any more. Really bad.
At least it was nice to see Barbara Bain in a small guest role, but she deserved much better than this.