John Churchill

When four men from Oregon go missing, the team looks for a common link; J.J. is upset when her son doesn't want to celebrate Halloween.

Supergirl's powers are tested when Reactron (guest star CHRIS BROWNING), one of Superman's formidable enemies, arrives in National City and targets the young hero. Also, Cat plans to run an expose on Supergirl.

The team reviews the 1966 shipboard killing of a young woman previously thought to have jumped overboard; Maj. Kitchener (Daniel Baldwin) stands trial for running Rush's car off a bridge.

When a woman's body is discovered in a missing showgirl's swimming pool, the team believes they've got a double murder on their hands.

A quadruple homicide shatters the serenity of a quiet suburban neighborhood and Grissom's team sets out to discover the motive behind the bizarre murders.

A serial killer begins leaving clues to taunt Grissom; Warrick and Nick clash when they investigate a car accident.