A popular high-school teacher is killed in a hit and run; Jane is preoccupied with Lt. Martinez's apparent favoritism toward his own drug unit.
A child reappears one year after he went missing -- but the team must work quickly when a trick-or-treater disappears under similar circumstances.
When the remains of a professional motorcycle racer are found in a hot spring, the team suspects his rival to be the murderer; Dr. Lance Sweets forces Booth and Brennan to accompany him on a double date.
Lilly and the team investigate when the 1958 suicide of a radio disc jockey is discovered to be a murder; they must find the truth of his life by decoding a hidden message in his final broadcast.
CSI team members search for the villain responsible when a young person dressed as a superhero is found murdered.