Palmer Davis

When Castle and Beckett find giant footprints at the site of a vicious murder, the team is forced to confront the unlikely theory that Bigfoot is the killer.

The team are called to the brutal murder of a much-loved football coach. When the case is linked to the drowning of a call girl, both a star player and a seedy sponsor are placed in the frame.

Grissom and his team investigate a five-year-old's death by starvation, while Catherine and her team try to find out who killed a prisoner in a holding-cell brawl.

The CSIs investigate the mysterious disappearance of two boys. Grissom employs the help of the sex offender to put him inside the mind of a paedophile and in turn catch the kidnapper.

After key evidence is disallowed in a rape and murder trial, the CSI team has only 24 hours to find new clues to nail the suspect.

Grissom's team find themselves under investigation when fresh evidence emerges during a murder trial.