Der Bürgermeister bittet die Mystery Inc. Gang um Hilfe: Ein mutierter Bär scheint es auf Destroido abgesehen zu haben. Schon nach kurzer Zeit haben Fred und die anderen ihren ersten Verdächtigen ausgemacht. Um sicherzugehen, ermitteln sie jedoch weiter und entdecken bald, dass sich das Ungeheuer in das Computersystem der Stadt einhackt – bestimmt nichts, was ein mutierter Bär tun kann.
A bear-like creature attacks Mayor Nettles and Sheriff Stone in the Crystal Cove woods near Destroido. They turn to the gang for help, explaining that the creature is called the Scarebear and has been stalking the grounds near the Destroido company for weeks. The gang finds out that the Destroido company has allowed toxic lithium to spill into the woods, which has resulted in the mutations of inhabitant plants and creatures including the Scarebear. Meanwhile, Mr. E and Professor Pericles have recruited Brad and Judy to help them find the gang's pieces of the Planispheric Disk, and have resorted to drastic measures to get the gang out of the way.
דוב אלים תוקף את העיר, ותאגיד המיסתורין מגלה שהוא מגיע מהשטח של חברת דסטרוידו. החבורה מנסה לפרוץ למעבדות החברה כדי לפתור את התעלומה.
A Crystal Cove sono tutti spaventati da uno strano orso mutante che crea il panico intorno alla Destroido. Si scoprirà che è solo una vittima.
A prefeita pede ajuda ao grupo para investigar o mistério do Urso do Medo, um urso mutante que está a aterrorizar a cidade de Destroido.
A prefeita aciona a turma para investigar o mistério do Urso do Medo, uma criatura mutante que está aterrorizando a cidade de Destroido.
