1. The 34th Floor

Complete story — includes the ending

Following the cliffhanger of "Vacation Getaway", Lindsay Monroe Messer kills Shane Casey. Five months later she is awarded a Combat Cross. She and her team return to the crime lab where Stella's replacement, Jo Danville has found the body of Sarah Nelson, a secretary in an architect's office on the floor below the crime lab. They determine she was killed by a pair of scissors. Later, they hear of a second victim from the office, Theodore Westwick, who survived an attack. After finding a dropped pair of scissors, the CSIs match the fingerprints to a high-end thief. When Danny and Flack catch him, he claims that he broke into the office and witnessed Westwick murder Nelson, and later defended himself when Westwick attempted to kill him, too. Danville and Hawkes prove the burglars claim. When Mac's team arrives to arrest Westwick he pulls a gun to make Mac and Flack shoot him.