After thirty years on the job as a demon hunter, Gary is looking forward to retirement. But when his boss reveals they still haven't found a new chosen one, Gary tries to take matters into his own hands.
Gary and Hanley must battle with the new mirror monster Grundleman, which dredges up some disturbing memories from Hanley's past.
When Gary finds out that a demon named Fleshler might still be alive - despite Gary killing him years ago - he recounts to Hanley the story behind the death of his true love, Janine.
Gary goes home and must confront a horror unlike any other - a family dinner with his parents and annoyingly perfect brother Steve.
Gary forms a bond with a tiger after it saves him from a demon but when the tiger starts exhibiting demonic behavior, Gary is faced with a difficult choice.
Gary tries to help his usually uptight boss Leslie confront her issues, unknowingly unleashing her inner demons.
When Gary spends a day with his niece, he realizes his demon hunting skills are no match for the terrors that can be inflicted by a teenage girl.
When teenagers start overdosing on a new demon-derived drug, Gary goes undercover at a high school to find the culprit.
The anniversary of his fiancee's death has Gary more down in the dumps than usual, but a chance encounter with a friend may be just what the doctor ordered...or not.
When Gary and Hanley head to an island resort to hunt down a demon, Gary is determined to turn it into a vacation despite the fact that trouble lurks everywhere - even in paradise.
A case concerning a possessed teen leads Gary and Hanley to suspect that a heavy metal band's music is to blame - only to discover that the rockers are not what they seem.
When Steve's wife throws him out, he ends up staying with Gary and they try to build the fraternal relationship they never had. However, it doesn't take long for old sibling rivalries to rear their ugly head.
Despite his moral objections, Gary is assigned to guard a famous demon porn star who's received a death threat. But as he gets to know the demon, Gary finds himself questioning his previous assumptions and prejudices.
Gary and Leslie head to Japan for the annual gathering of the world's demon hunters, but Gary is in for the surprise of his life when he realizes all his old cohorts have retired - replaced by bright eyed and bushy tailed teenagers.
At a restaurant to celebrate his birthday, Gary thinks his teenage waiter could be the new chosen one. Nobody buys it, but Gary is determined to prove this kid is his replacement so he can finally retire.
Gary is finally enjoying his long overdue retirement when he hears his nemesis Fleshler has returned. He makes his way back to the ministry only to find that everything has changed in his absence - or has it?
With Tucker in a coma and demon activity on the rise, Gary's job is harder than ever. With funding at all time low and danger at an all time high, the Ministry hires an intern, Mudge, who is of no help at all.
Gary is public enemy number one when Tucker goes missing. He must work to undo a selfish mistake while facing his most twisted of enemies: Tucker Fans. Mudge returns only to prove they're more useless than even previously thought.
Just when Gary thinks the Ministry can't get any worse, he discovers they're allowing his nemesis to regenerate. Gary is accidentally impregnated with it's egg when he tries to destroy him and is forced to birth his demon offspring.
Fed up with his life and job, Gary moves to the forest where he befriends a group of Fed up demons also looking to escape the daily grind. Leslie and Hanley are forced to go after him when the Ministry begins to fall apart in his absence.
In an attempt to get his baby nemesis out of his life and the Ministry for good, Gary puts him up for adoption.
Leslie, Gary and Tucker take a day trip to visit a billionaire on his Superyacht to secure an investment for the Ministry. Things go perfectly fine - until they don't.
When Leslie discovers her daughter, Didi, has an imaginary friend, she enlists the help of Gary to hunt him down and destroy him. This time, it's personal.
Intent to destroy humanity , the Prophetess takes one last stab at leading the Demon Revolution. Executing a plan to free the Evil Book from the Ministry's vaults won't be easy, considering her last remaining minion is Larry, her sex toy.
The prophecy is finally fulfilled; an ancient demon rises and the Demon Revolution begins. The Ministry struggles to save humanity from the powerful Ryndok, and Gary learns something new about his body.
It doesn't look good for humankind as the Demon Revolution continues and the end is nigh. Gary has a very sore back and looks to the rest of his team for help in defeating Ryndok.
