House and his team meet a nun who is dealing with symptoms similar to an allergic reaction. The team are unaware of her past actions that are causing the current problem.
Grissom and Catherine investigate the murder of a premiere chef; Sara and Warrick investigate an apparent suicide.
The team investigate the background of the sole casualty at a crime scene after they discover napalm. They suspect a possible link with terrorism.
A runner dies from apparent carbon monoxide poisoning while competing in a marathon in Central Park, and the team has to fight through crowds to collect the evidence.
The team re-examines the 1994 case of a 16-year-old girl's rape and murder. The man Jeffries arrested in 1994 pleads his innocence three days before his execution.