Finlay shows her frustration when the Gig Harbor Killer appears to hit again on CSI. "The Twin Paradox" is the sixth episode of the show's 15th season.

A chance to relax at a forensics conference turns deadly on CSI. "Girls Gone Wilder" is the fifth episode of the show's 15th season.

The team investigates when a science teacher's experiment goes horribly wrong on CSI. "The Book of Shadows" is the fourth episode of the show's 15th season.

Greg and Sara end up in quarantine after coming across a contaminated crime scene on CSI. "Bad Blood" is the third episode of the show's 15th season.