Engaged couple Tara & Josh won't walk down the aisle till their unspayed, hormonal ex-alley cat Larry stops rampaging. Heather and Alan contend with Ruby, a violently misogynist cat who, stuck in cycles of fear and jealousy, starts ruining Heather's in-home business.

Partners Lori and Shanna and their regular housecat Missy need protection from City, a completely ferocious, part-Bengal mix. With a baby on the way, Ned and Kellee need to change the behavior of Max, a vicious, formerly abused feline who's become a neighborhood terror.

Tales of "problem children:" Alpha cat Kleo absorbs the electrically charged, argumentative personalities of owner Brooklyn and her steady boyfriend Tim. Marco feels trapped and can't abide anyone - not owner Bobby nor his significant other In-Hae - but the key comes in training In-Hae's miniature dog Yuki.

Jackson encounters two furious cats, each with medical conditions, one from an old injury (Stella) and the other from over-eating (Mr. Fluff). In addition, Jackson meets an owner resistant to the aesthetics of "cat-ifying" his home and a couple perpetually terrified of incurring their cat's wrath at bedtime.

Roommates Laura & Lizzy present Jackson with a cat named Penny Lane who's behavior truly scares him. A new house sends former buddy housecats Roxy & Max at each other's throats, stressing newlyweds Karen and Martin.

Escalating violence between two Sphinx cats (Black Rose and Mathilde) keep engaged couple Steve and Deirdre up at night. Dorothy and Travis fear their vomiting cat Polly will someday soon attack their toddler son Rex.