Vernon and David are travelling in a tanker which overturns spilling its load. Vernon is taken to hospital with memory loss and David claims not to know what they were carrying. The police discover that the tanker has false number plates and its contents are contaminating the water supply.
A local pork producer is impressed by Luanne, who goes to his home for a job interview but comes away as his girlfriend.
Dale exterminates at the Mega Lo Mart, thanks to an endorsement from a reluctant Hank.
Black Hole energy interferes once again. While the Janitor senses something will soon occur, the members of the Science Club continue their exploration of the paranormal phenomenon which afflicts the school. But secrets concerning strange phenomenon at BHH are given to Victor Pearson by Vaughn. As a result, Vaughn is in a bad mood. Which literally produces a strange occurrence! Do his emotions cause the catastrophic storm above his head? How will Vaughn make the gray clouds, which follow him all the time, disappear for good?
Personal grief has to be put aside when brilliant detective Red Metcalfe is faced with a series of grisly and sadistic killings. Each body provides a taunting clue to the murder method to come and the police team and their families could be next on the hit list.
The girls audition for a television talent show with a bit of help from Sabrina's magic.
Barnaby investigates a death which looks very much like suicide. The dead man was a troubed and depressed gambler on a losing streak, but Barnaby's nose tells him to look for a murderer. During the investigation he recognizes someone from his past, in the shape of Dr Jane Moore.
A six-year-old girl is critically injured in an apparent robbery-gone-bad and later dies. The investigation gets complicated when it is discovered that the murders were designed to silence the young girl, who was sexually abused.
Children unwittingly reopen an ancient battle between Autobots and Decepticons.
The team is called into battle unexpectedly when the Asgard homeworld is overrun by Replicators -- which have evolved into a startling new form.
JT the class clown gets in trouble and spends the week afterschool with the hot science teacher Ms. Haztilakos but along the way he finds that she is a person not just a hot teacher and he earns her respect. Jimmy and Spinner are starting to tell the truth forever and end up with unexpected results.
When Animology sweeps over the school, Kim tries to avoid it, but she gives into the fad. Meanwhile, the Seniors start their most dangerous plot to date.
After Oswald fails his nursing school exam, Drew feels bad and helps him get a job at the web site. Oswald finds a way to nearly destroy the entire business. He ends up being reassigned to a job that he (sort of) knows how to do--delivering packages. Mimi repeatedly sucks up to Traylor in an attempt to get on her good side after trying to kill her.
The Delightful Children From Down The Lane attack Sector V's headquarters with an infestation of hair-eating lice. After the KND find out they don't like nacho cheese, they decide to shoot nacho cheese at them to get rid of them.
Lenny renews his duel of wits with John, kidnapping Lt. Avery and sending a series of cryptic clues with a fatal deadline. A new captain makes things hard for John and he and Digger go off on their own to hunt down the killer. John meets up with Frank and they figure both that the police are on the wrong trail going into a booby trap and where Lenny really is. But Frank accidentally shoots John, killing him and letting Lenny escape. It's a ruse to draw Lenny out at the cemetery with no one in the way, one that (more or less) works. We do find out that Lenny branded himself with John's mark and didn't have any deep connection to him.
Harold allows a boy scout troop to come to the Lodge and educate the men about the outdoors. Red puts s device in his mailbox to prevent junk mail from getting through. Walter has trouble when he tries to split firewood. Red builds a loveseat that expands into a full sized couch. Red installs a manhole cover on his engine for making giant waffles.
Reba suggests that the family create a time capsule and videotape private messages for Cheyenne's baby, Elizabeth. Unfortunately, privacy is thrown out the window and feelings are hurt when curiosity gets the best of everyone and they foolishly decide to watch the tape.
Holly has a major crush on a cute college guy named Evan and he's been coming in everyday at "Copy That" to get some coffee but Holly gets a chance to actually know him when she "accidentially" takes Evan's cell phone and gets invited to a college party to swap phones. Gary wants to come too, but Holly doesn't want him to interfere. However, despite Holly's wishes, Gary shows up at the party as a co-ed to get in with the college girls. Meanwhile, Val starts to get a little competitive at Scrabble.