In the third installment of the Scary Movie franchise, news anchorwoman Cindy Campbell has to investigate mysterious crop circles and killing video tapes, and help the President stop an alien invasion in the process.

"There are those among us who can move at will between the world of the wolves and the world of the humans. My people call them skin walkers." Seattle police detective John Kanin has a problem. He's in love, but shortly after agreeing to marry him, his girlfriend disapears. His search leads to her home town, where people are clearly hiding information from him. One of the things they are hiding is the fact that they are all werewolves, as is John's girlfriend, Ruby.

"There are those among us who can move at will between the world of the wolves and the world of the humans. My people call them skin walkers." Seattle police detective John Kanin has a problem. He's in love, but shortly after agreeing to marry him, his girlfriend disapears. His search leads to her home town, where people are clearly hiding information from him. One of the things they are hiding is the fact that they are all werewolves, as is John's girlfriend, Ruby.

Super soldier Max Guevera tries to live a normal life in post-apocalyptic Seattle while eluding capture by government agents from the covert biotech facility she escaped from as a child and searching for her genetically-enhanced brothers and sisters who have dispersed after escape.

In his basement in San Francisco, boy-genius Quinn Mallory unlocks the doorway to an infinite number of Earths. During a test run, Quinn invites co-worker Wade Welles and his teacher Professor Maximillian Arturo to see his new invention. But an increase in power and an early departure leave all three, plus a washed-up soul singer named Rembrandt "Crying Man" Brown, lost in a parallel world. Now they must "slide" from world to world, not only adapting to their changing surroundings, but also trying to get back to their world. Will they ever make it home?

Nurse and con artist Belle Haimes lives with her dull-witted husband Rex Haimes in the Hart Mansion in British Columbia. There, she cares for the invalid 103 year old Slim Hart, aka Pappy, and his comatose wife Minnie. Fed up with her job, Belle plots the death of old Mrs. Hart and the kidnapping of Old Pappy, but things don't go quite according to plan.