The Deadly Conspiracy
As I recall, a brutally graphic episode. If memory serves, Charles Durning punched Lynette Mettey in the body, doubling her over. He then strangled her -- might have raped her as well; don't recall.
When Oliver Clark's character showed up (as some kind of delivery guy), Durning's character knocked him unconscious, then pulled him alongside Mettey's body. Durning grabbed Mettey's hand and used her long fingernails to slash Clark's face, setting him up for the murder.
Pretty rough stuff, then and even now --