No idea why or how Ian was playing two characters during CSI Season 13 Episode 21, but he sure looks good doing it, doesn't he? This one is about ghost hunters, and they were killed on location. Bohen's location. Uh oh...

Ozzie Osbourne and Black Sabbath made an appearance on the CSI Season 13 Season Finale. Who in the hell would have expected that one? Not me!

Jason Priestly was a suspect in the murder of Bethany Joy Lenz on CSI Season 14 Episode 5. Can this really be the face of a murderer? Probably.

Was Jennifer Rhodes "Under a Cloud" on CSI Season 14 Episode 7? We'd have to ask Lea Thomspon, I suppose! She was helping on a case when a dude went into a crime scene without consent.

John Heard made an appearance on CSI Season 14 Episode 15 as a shady character named Roger Ridley who was involved in prostitution that might have encapsulated 16-year-old girls. No bueno.

Gene Simmons played a version of himself on CSI Season 14 Episode 17, offering fans the "fame experience." But a chick got killed on the fake rock star bus. Whoops!

Greg Gunberg is one of a few guest stars on CSI Season 15 Episode 7 taking the "Road to Recovery." Follow to the next slide to see who joined him for the stay at rehab!

Merrin Dungey was one of the counselors on "Road to Recovery." Does that make her more of a suspect? Give it a watch to find out!

Hey, her hubby had already made an appearance on the show, so why not Sharon? She guest starred as Elisa Massey on CSI Season 15 Episode 10.

Lisa Rinna's daughters are missing on CSI Season 15 Episode 17, but she wasn't the best mother, so there are things she did very, very wrong. That's why she's crying. They caught right up to her.