When Nick and Greg investigate a possible 427, the tables get turned when one of them is kidnapped. With their life trapped by the ruthless hold of a sadistic madman, a methodical plot unfolds when the motive behind this torturous crime of passion is discovered and leaves the CSI's lost in a turmoil of emotions and doubting if they'll be able to save their friend in time.

Catherine, Greg and Nick struggle through a brutal hostage crisis and only two CSIs make it out. The entire team grapples with the aftermath, uncovering mysteries -- including a tragic love story of years past -- in the process. NG CW

As one relationship ends—painfully—for Greg, another one blossoms from its ashes. Nick/Greg.

Greg Sanders thought he finally found the perfect woman in Ashley Stokes, that it until he met her brother, now he's questioning everything he ever though about himself when Nick Stokes turns his world upside down. AU NickGreg slash

A Muslim woman's brutal murder triggers a bloody chain of events for Greg and Nick as they and 22 others are held hostage until the murderer confesses. As Sara uses her broken Arabic to negotiate, Nick and Greg learn more about their supposed enemies.