While strolling along on the beach, discussing their future, Rafe, Sara and Goodwin discover the teenaged Kiyomi lying on the sand. She has no memory of anything that happened to her since her disappearance 3 centuries ago.

If Raph, Goodwin and Sara can destroy Mallos as a human, they can stop him from ever existing as a demon. Ironically, by destroying Mallos, they set forth the very pattern that allowed him to make his ""deal with the devil"" and become a demon in the first place.

While travelling in Europe, Goodwin has dreams of a special girl. Raphael relates to Sara (in flashback) how they came to Europe once before on the trail of Mallos.

The team travels halfway across the world to Eastern Europe when Raphael hears of a murder/kidnapping eerily similar to that of his wife and daughter's. Certain that Mallos is once again behind it, he's determined not to let history repeat itself and vows to reunite this father with his daughter.

The Immortal one, Sara and Goodwin are still in Europe when Sara is mysterioiusly kidnapped. The trail leads to a castle where a female demon has set up a ""fantasy resort"" for rich individuals.

While going through some old things of Sara's, she finds a photo of her grandmother from the 40's...posing with Raphael and Goodwin.

While on the trail of a demon, Raphael ends up inside a run-down, neighborhood bar. Unable to escape, he slowly discovers that he is locked in his own introspective voyage of emotional discovery until he is willing to admit to a few emotional realities.

Rodan, yet another evil demon, has a scheme: he is tapping into the despair and misery of human souls and converting it into music that allows him to control humans. Sara, striking out on her own, is visiting Rodan's club and becomes romantically involved with him.

While on the trail of the demon Ashur, Raphael is put into a mystic coma, appearing dead to Sara and Goodwin. Goodwin is now faced with the responsibility of taking on the role of Immortal Demonhunter.

When the team discovers a preppy boarding school is a source of demonic brainwashing, Goodwin and Sara go undercover to learn the truth and expose the demon agenda. Raphael finds himself bonding in the woods with a misunderstood teen on the run from the school.

Mallos returns with a deadly plan: having Raphael trapped in a mental institution, he does his demonic best to convince him he is not an immortal demon slayer, but ""Ralph"", an abusive drunken truck driver with impossible heroic delusions. The doctor in charge is unaware that he is serving the demons' cause.

The trail of demons takes Rafael, Goodwin and Sara to the northwest forests. Three nature spirits, sisters, share a crystal among themselves.

Raphael is targeted by three demon assassins. He defeats the first one readily enough. The second, Oniko, is a female demon whom he briefly confronted early in his career. She tries to deceive him into trying to kill the third assassin, Randall (from the episode Half Way). However, it's a trap, and Raphael is attached to the generators at the local electrical plant. Meanwhile, Goodwin and Sara are looking for a permanent residence and run afoul of a demonic real estate agent who locks them up. They manage to escape and, overhearing the demons' plans for Raphael, get to the plant and free him. In the final battle Raphael sends Randall back to Hell.

The theft of a jewel, the ""Bride's Kiss"", set the team on the trail of a demon who plans to use it to enthrall a millionaire/computer genius who has created a computer virus capable of destroying most computers. The trio manage to infiltrate the wedding reception and discover that the bridegroom, Maximillian, is a demon.

Blaylock, a demon who can change forms and favors plagues, breaks into a government research lab and steals a virulent new germ-warfare disease. He escapes ahead of Raphael, who is taken into custody by the FBI.

A mysterious death of a couch potato leads Raphael and Goodwin to cable studio D, while Sara investigates the victim's homelife. The demons have developed a way to broadcast Hellish transmissions that first suck unsuspecting viewers in to compulsively watching, then drive them to suicide.

Goodwin is in love with a woman who is in cahoots with a demonic artist. They have occupied a loft that stands on a site of great magical power, and plan to use it to open the way to Hell.

Deciding to take a break, the trio check into a ""fantasy suite"" type hotel, unaware that it is a haven for demon. Through the fantasy-decorated hotel rooms, guests are sent to a extra-dimensional region with the same motif, and used as a plaything for demons on ""vacation"".

A demon body-jumper is the Immortal's newest threat: immune to his sword, it jumps bodies with impunity, including the body of Sara's romantic interest: a detective investigating the series of bizarre murders it leaves behind. Ultimately the trio track it to a hospital where it plans to take over the body of a senator and spread chaos from such a high position.

McQueen, an aging rock star, has a deprogramming center for demons on his farm. Raphael is skeptical about reforming evil, though Sara tries to see things from a scientific angle.

In part 2, Mallos and Vashista torment Goodwin and use him as bait to draw in Raphael. The plan succeeds, but only after Mallos has sadistically ripped off Vashista's hand and sent her back to Hell himself.

In the premiere episode, parapsychologist Dr. Sara Beckman is attempting to use a demon-summoning device, which serves its purpose all too well.