Chad Williams

Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of a couple in a hotel room, initially thought to be a murder-suicide.

The CSI's offices have relocated to a Manhattan high rise which includes new labs, a staff break room and new office equipment with state of the art technology. Also, after expressing his interest in moving out of the coroner's office, Dr. Hawkes joins the team in the field and his first case has him working with Mac on the death of a skyscraper climber. Although hundreds of witnesses were on hand to see the climber fall, the team suspects foul play and believes someone caused his death.

When a U.S. Marine is killed in Central Park during Fleet Week, a New York annual tradition showcasing military pride and achievement, Mac personally tracks down the killer and discovers he may be a civilian who isn't a fan of "the few and the proud." The recovery and identity of a body murdered and then burned beyond recognition in a car fire turns out to be a former CSI, Aiden. (TV-14)

An IRS agent is killed while trying to repossess a delinquent taxpayer's yacht.