Will Schaub

A teenager is found murdered on a construction site. Grissom, Sara, and Warrick follow the lead of blood on a hammer.

Cate orders Kerry, Rory and Jim join the YMCA; Rory falls for a yoga instructor (Lisa Rinna); Jim punches a man for making a lewd remark about Bridget.

Sydney becomes infected with a mind-altering and potentially deadly hallucinogen, causing her to slowly lose touch with reality. Vaughn and Jack must scramble to find an antidote before Sydney's hallucinations, paranoia and resultant violent behavior threaten her life and the lives of those around her.

Mac is charged with misconduct and breach of ethics when she admits to looking at evidence forbidden to the prosecution.

Harm and Mac arrive for the trial of three MPs charged with abusing a prisoner at the Guantanamo Bay prison camp for al-Qaida terrorists.

Sam Beckett (Scott Bakula) leaps into the body of New York actor Joe Thurlow, 25, living with Jane Lindhurst, who is 50 years old. Sam must persuade Jane to stay in New York and follow her dream to become a singer.