Delivery Debbie goes undercover to stop a group of villains. When Olympia finds out Dr. O is leaving, she struggles to throw the best goodbye party ever.
When the alarm system at Headquarters is triggered, Olive, Otto, Ms. O and Oscar must avoid a series of booby traps in order to shut it off. Olive and Otto explain to Ms. O how a case went wrong, each in their own way.
Oona and the Oonabots - Oona uses her Oonabots to help Ocean catch a creature./ The Ninja Situation - Otis must go undercover as a ninja to recover a stolen Odd Squad gadget from a pair of strange villains.