The New Scooby-Doo Movies (1972)

S2E5 The Exterminator

Former Get Smart agent Don Adams seems to be struggling in the entertainment world, now working at the Adams Extermination Company. When he's tasked with clearing out pests from the spooky abode of horror star Lorne Chumley at Horror Hill, his friends join him on the job, oblivious to the lurking perils that await them inside the mansion.