Jim Ellison is a police detective in Cascade, Washington and discovers he has heightened senses, he can see and hear what others can't. The only person who can help him is Blair Sandburg, an anthropology grad student who has studied tribal guardians, or Sentinels. Sandburg offers to help Ellison learn to use his heightened senses in exchange for writing about the detective for his thesis.
Captain James Ellison, US Army Rangers, is rescued after spending eighteen months on a mission in Peru. Five years later, he is a detective for the Cascade, Washington police when he starts to have problems with his senses: seeing and hearing things others cannot. When he loses a suspect as a result, he wants answers and finds them in an Anthropology grad student named Blair Sandburg.
Garrett Kincaid, leader of the Sunrise Patriots, invades the Cascade PD building in a bid to free two of his men convicted of a series of bombings.
Ellison is determined to hunt down the man who killed his friend, Danny. It doesn't matter that the suspect, Tommy Juno, has an air tight alibi or that Ellison's senses are fading in and out.
The destruction of a drug lab is the first step in an all out gang war unless Ellison can figure out who is really behind it.
Ellison investigates a serial killer who drowns his victims and then impersonates them.
Ellison and Sandburg must bring a reluctant witness to Cascade. The witness refuses to fly and Ellison's senses are acting up do to a dose of cold medicine.
A rogue CIA agent steals a canister of Ebola in order to coerce Ellison into helping steal a top secret plane.
After a foiled bank robbery, Ellison tracks down the source of the high-powered weaponry the bank robbers were using. The case is complicated by a by-the-book AFT agent and Sandburg becoming romantically entangled with the daughter of Ellison's chief suspect.
Ellison is distracted from an investigation into a series of jewelry robberies by a woman with whom he has a primal attraction.
Sandburg takes Ellison to a monastery as a vacation and a chance to recharge his Sentinel abilities. The vacation is cut short, however, when someone starts killing the monks.
Simon takes Daryl along on a trip to Peru in order to bond with his son. When their helicopter is reported shot down, Ellison and Sandburg fly to Peru to find them. However, Ellison's senses are offline and a spirit guide tells him he must make a choice about his future and his heightened senses.
Ellison must protect a singer from a murderous stalker.
Ellison is investigated by IA after his old partner's car is found and both men are suspected of killing a kidnap victim and stealing the ransom money.
While attending his twentieth high school reunion, Simon is accused of murdering an old high school sweetheart.
What starts as a triple murder at a night club, quickly escalates to all out gang war between two rivals for the drug trade in Cascade.
Ellison works to solve a series of bank robberies, all the while dealing with a producer from True Crime who wants to film a day-in-the-life of a police detective.
Ellison hunts for an international assassin after a college call girl witnesses him commit a murder.
Ellison and Sandburg are set out to an oil rig to investigate a mysterious death. They run into trouble, however when no one on the rig will talk to them.
Complete episode guide for The Sentinel with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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