Mary Alyce Kania

When a corporate law firm courts Marshall, lawyer Jeff Coatsworth (guest star John Cho) wins him over, forcing him to let go of his dream of saving the earth in favor of the almighty dollar.

The investigation of a dead census worker sends the team into a high speed car chase and an explosion that threatens the lives of two CSIs.

A serial killer taunts the CSIs by leaving them cryptic hints, and the longer it takes them to decode these puzzles, the higher the death toll rises.

Sam borrows Dena's dog to see if she's nurturing enough to be a mother; Regina starts taking pilot lessons; Andrea continues to "date" Tony Dane.