Sonja Flemming/CBS
Lynette Rice
October 23, 2013 AT 06:42 PM EDT

CBS will air the 300th episode of CSI tonight, so to mark the milestone we’ve reviewed the hundreds of actors who have crawled inside the yellow tape (Melinda Clarke, yes! Carrot Top, no!) to create this gallery of the drama’s 10 most intriguing guest stars.

Sonja Flemming/CBS

1. Justin Bieber. The singer appeared in episodes 1101 and 1115 as troubled teen Jason McCann, which led to star Marg Helgenberger calling him “kind of a brat” to a French magazine. (Um, he supposedly locked a producer in a closet). At least he was shot in the end.

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