Gracie's Red Robin troop goes to Grandma Yetta's retirement home to "adopt" a grandparent. When Gracie's first and second picks pass away, it sours her on scouting.
Blossom is furious when Joey refuses to set her up on a date with his handsome but dumb teammate Richie, but has to admit he was right when a double date with Joey's dim new girlfriend Tanya bores her to distraction. Meanwhile, Kennedy finds a lost bulldog and is heartbroken when his owner claims him; and Shelly keeps picking on Anthony but won't say why - until we finally learn she is pregnant.
Neri brings Jason's attention to a toxic dump in the ocean that is making Charlie sick. When Jason is reprimanded for leaving an important project, it is up to Lee, Brett, Froggy and Zoe to prove to Commander Lucas that the dumping of waste in the ocean is occurring. A barrel is recovered and dramatically revealed during a presentation on ORCA by Zenco, a major sponsor of ORCA research and the company responsible for dumping the waste. Neri once again expresses her desire to see the inside of ORCA.
The brothers Pete come to the rescue of fellow trick-or-treaters when the Pumpkin Eaters threaten to ruin Halloween for Wellsville.
The discovery of an old document may make Cabot Cove rewrite its history.
Clark needs to protect Lois against a man she sent to jail five years ago, and what this man wants more is revenge.
Al turns the store into a man's shoe store in an attempt to get rid of the women.
Hawkeye saves a settler from the French trader who kidnapped her, but killing him prompts revenge from the trader's Huron allies.
A former friend, Max Hunter, who believes Lovejoy had an affair with his wife, kidnaps Charlotte and plans to kill her. But he gives Lovejoy a sporting chance to find him by leaving a series of clues.
The Shadow Master once again uses a virtual reality system, this time to absorb people's minds and become the smartest man alive. Billy, Jimmy and Kona must once again team up with Megabyte and Sashiko to stop the Shadow Master and free the imprisoned minds.
Mayor Quimby pardons attempted murderer Sideshow Bob, who then runs against Quimby for mayor.
When Wanda's pet frog, Bella, jumps out an open window, Ms. Frizzle shrinks the bus into a mechanical frog and takes her now tiny class on a hop-along adventure.
On her way home from school Alex Mack is practically hit by a truck. The truck is carrying a top-secret chemical and spills it on Alex. Alex learns later that she has magical powers and shares this secret with her sister, Annie, and best friend, Raymond.
Wyatt and Gary switch lives, courtesy of Lisa, only to find that the pasture isn't as green on the other side.
The male staff is up for bids at the annual charity auction at the Country Club. Rachel, hoping to avoid her recent romantic entanglements, purchases a nerd. Alison buys Brian, making Screech jealous. Megan gets stuck with Bobby. Tommy hopes he and Lindsay don't win the prize, a balloon ride, because he doesn't want her to know he's afraid of heights.
It's Bayside's prank day and everyone is playing tricks on each other. But it's no joke when Belding makes the mistake of inviting the new superintendent to Bayside. He cancels prank day but when no one listens it spells disaster for Belding.
Namor, the Sub Mariner, rises from Atlantis onto dry land. He encounters Sue and kidnaps her, wanting her to be queen of Atlantis.
A boy is transported by to the Revolutionary War, where he must help a solider return to his girlfriend, before she marries another man.
Donna, a girl Richie dated briefly several years ago, returns with her 18-month-old son -- who she claims is Richie's! While MacLeod reminds him that it's impossible, that Immortals are unable to have children, Richie sees this as an opportunity to have the family he never had and never will be able to again. When Kern, an evil Immortal, rides into town, MacLeod is reminded of his own foster son, Kahani. Kahani and his Sioux Indian mother, Little Deer, were massacred over a hundred years ago by U.S. soldiers led by Kern, then a mercenary scout. MacLeod is eager to even the score. When Donna finds Richie's sword and demands to know what it's for, Richie is at a loss to tell her. MacLeod advises Richie that it would be safer and kinder to Donna and the baby to leave them. When his new-found family is threatened by Kern, Richie realizes MacLeod is right. While MacLeod rids the world of the evil Kern, Richie lets go of the only family he'll ever have.