A loyal police dog's spirit takes control of a criminal's body to search for its killer.

Dr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.

The exploits of FBI Special Agents Fox Mulder and Dana Scully who investigate X-Files: marginalized, unsolved cases involving paranormal phenomena. Mulder believes in the existence of aliens and the paranormal while Scully, a skeptic, is assigned to make scientific analyses of Mulder's discoveries that debunk Mulder's work and thus return him to mainstream cases.