On Tonight

An anonymous letter leads authorities investigating the poisoning death of a chiropractor to an unlikely suspect.

Detectives find a message written in blood during a murder investigation.

Alicia and the children try to adjust to Peter being home.

Alicia and will defend an attorney arrested for murder while Peter strategizes with his team on his public rehabilitation.

The CSIs solve the murder of a man who was killed in outer space.

Horatio and Delko must travel to Los Angeles when a secret from Jesse's past may allow a killer to go free.

Goren and Eames take on a doctor whose belief in his own superiority is exceeded only by his brazen murders of his patients and helping himself to their jewelry.

The murder of a mob witness and attempted murder of an undercover officer lead the detectives into a chess game being played by a fading mob don.

A string of identical murders becomes personal when Voight’s friend falls victim to the gunman.

With Bembenek behind bars, intelligence learns that it’s not just Halstead in harm’s way.