Chad Morgan

As the birth date of her triplets quickly approaches, a frazzled and emotional Rebecca forgets Jack's birthday. Dr. K struggles with the loss of his wife and wonders how he'll be able to continue on with his life without her. Joe - the firefighter who delivered baby Randall to the hospital - fights to save his marriage.

The team must find out if one team’s fun led to murder in the New York version of the Iditarod.The CSI must find who or what may have caused a rich man to be alone in his apartment.

After collecting the evidence to a crime scene involving a murdered undercover ATF agent, Calleigh is run off the road into a canal, corrupting her evidence. Since almost none of the evidence is salvageable, the CSIs must work to uncover new, untouched evidence in order to solve the case. Meanwhile, Calleigh's ex-boyfriend, also an undercover ATF agent, offers conflicting insight into the investigation.

Cory and Topanga's agreement to tell everyone everything creates tension at Rachel and Jack's dinner party.