When stuff goes missing, Brittany Campbell blames her husband-she doesn't know a stranger living inside their home plans to use the couple in medical experiments. Next, when Madisyn Gidrey's clothes disappear, friends tease that it's all in her mind-but it's not funny when a handprint appears on her mirror.

Tina Bowen believes her dead mother is playing tricks on the family-until a battle with a flesh-and-blood intruder uncovers a real-life horror movie. Next, Amber Dawn feels uneasy in her new apartment-her dog barks at nothing and lights turn on and off-and the danger explodes one dark night.

When her family's gifts go missing, Stacy Ferrance blames the kids-but a dirty footprint leads her to a shocking surprise in the attic. Next, college students Brett Mugglin and Mark Hartman hear eerie sounds and find their kitchen trashed before stumbling across a roommate they never knew they had.

Vickie Martin's ex has invaded her home and turned her life into a living hell, until she decides to turn the tables on her tormentor; Paul Mohlman discovers a meth lab under construction beneath his house.

After their wedding shower, engaged couple Timothy and Amanda find uninvited guests in their crawlspace; they see a man wearing Amanda's clothes; when Presley Brown hears creepy noises, she lets out a blood-curdling scream.

When odd noises fill Courtney Randolph's home, her two exes offer to help; things become more chaotic; she's blind to what's happening; Davis Wahlman reports that he saw a woman jog out of his house; when the cops leave, he gets another surprise.

A raised toilet seat alerts Kate Flory to an uninvited male visitor; a confrontation with the intruder sends Kate screaming to the streets; Samuel Bryan finds blood and muddy footprints.

Helena Jayne Bryant notices things missing; it takes a sinister encounter with her home invader to make her finally wake up; Brian O'Neill's Seattle condo turns into a war zone when he looks under his bed and finds a phrogger with a knife.

Sherry Lovell blames her grandchildren for hoarding food, until she faces the culprit; it's a man from her past hiding in her crawlspace; Paul Haynes returns from overseas and finds four phroggers on his balcony, triggering a nightmare.

After Heidi Lane moves to the big city, her underwear starts disappearing; she spots a man peering down through holes in the ceiling; when Jordan Buranskas can't find her purse, her boyfriend plays back security footage.