TV-PG. When a controversial university professor is found dead in his classroom, Charlie and Rex investigate leads while Jesse goes undercover and soon finds himself danger.

TV-PG. Hudson and Rex investigate a string of recent deaths at a retirement home.

TV-PG. A gunman takes hostages at a lab to find proof they altered his wife's brain in a drug trial.-V

TV-PG. When a food truck blows up killing a young woman, it's up to Rex to sniff out the killer.

TV-PG. Charlie investigates the host of a morning show after her media mogul husband is found dead.

TV-PG. Charlie investigates when a gallery curator is found murdered on his showroom floor.

TV-PG. Activists break into a bottling factory to get their message across, until one is killed.

TV-PG. When Donovan's ex, a recovering addict, wakes up with blood on her hands and a dead roommate in her apartment, the team moves quickly, finding there's more to the story.

TV-PG. When a deadly car accident leads Charlie and Rex to investigate reports of a mysterious blue light in the sky, they discover the truth is more science than fiction.