1x8 - Maniac Mansion

A gangster boss just got out of prison so he sends his two stoolies to look for the guy who ratted on him, Harry Orca. Turner lets them into the house by mistake, and they hold the family hostage and almost kill Harry. Richard comes over to complain about an illegaly-parked car but he leaves without realizing that the family is in danger. When the gangsters can't bring themselves to kill Fred, Idella takes the matter into her own hands and chases them out of the mansion right into the arms of Richard Pratt and two policemen.