Bo's involvement in a mystery game endangers him and Shirley.
Mr. Howie imprisons Ms. Stratmann during a medieval festival.
A false report kills Molly's horse.
Shirley sees Bo's cousin stealing.
Shirley receives orchids from an unknown source.
A teenage television star faces death threats.
A Frenchman showers Alicia with attention.
Shirley's discovery threatens a politician's career.
The basketball team faces sabotage.
Shirley needs help finding out why the math curriculum is disappearing.
A virus is stolen from Shirley's mother's lab.
A ghostly spirit trying to harm Mr. Howie takes over Alicia.
Bo rigs a television quiz show.
Shirley and her father search for her missing mother in Rwanda.
Shirley and Bo quarrel over labor practices at a Rwandan ruby mine.
An unusual thief robs Alicia at a cafe.
A gang steals Bo's clothes.
Shirley and Bo try to find out if a popular rock star is a fake.
Local police suspect a woman of leading a double life.
Shirley must uncover the root of Bo's strange behavior.
Alicia makes a horror film.
Shirley stumbles into a trap while searching for her missing grandmother.
Mr. Howie suddenly disappears from school.
Stink is expelled from school.
Shirley investigates the disappearance of ranch horses.
Shirley investigates the disappearance of Dr. O'Henry.
Strange accidents work in musician Zack's favor.
A disoriented man has a stethoscope belonging to Shirley's missing mother.
Stories of ghosts, treasure and treachery haunt a camping trip.
A top-secret decoder is missing from Robert Holmes' safe.
A poltergeist provides entertainment for Bart's 12th birthday party.
Bo befriends a crazy old lady and gets more than he bargained for.
Something is living in Sussex Academy's sewer system.
Mishaps plague a favorite kiddie show.
Bo is infatuated with a new student with a mysterious past.
When the circus come to town, somebody leaves a baby on Mr. Howie's doorstep.
A 6-year-old snatches Shirley's backpack.
Neighborhood cats go missing, and Stink's dog, Barf, is the prime suspect.
Mishaps seem to follow sensitive Ms. Flitt (Shelley Duvall), the school librarian.
Shirley is cast in a production of "A Midsummer Night's Dream."
Shirley's father is seen kissing pop star Leah Farrell.
A burial box disappears from a reservation.
Stink disappears from his birthday party.
Shirley investigates Ms. Stratmann's strange behavior.
A girl acts strangely after receiving an ancient Egyptian toy.
Shirley investigates the appearance of a ghost.
Shirley investigates Bo's suddenly strange behavior.
Shirley investigates reports of alien abductions.
Shirley investigates a cafeteria assistant stealing food.
Shirley investigates a break-in at a pet store.
Presidential candidate Alicia Gianelli is electrocuted.
Shirley investigates a rash of suspicious fires.