Continuity mistake: Joan Crawford said that when she gets nervous, her right foot - due to an accident as a child - slips out of her shoe. But later on, it's her left foot now that causes it to slip out of her shoe.
Continuity mistake: Susan Lucci's hair color goes back and forth from reddish brown to black in several scenes.
Character mistake: While sitting on the bed, Darkly relays the story of how he got his name, saying it comes from 2 Corinthians 13:12. It, in fact, comes from 1 Corinthians 13:12. (00:10:55)
Continuity mistake: After Racine is wheeled out of the hotel on a stretcher, the uniformed police officers hand their inspector an evidence bag with the weapon used on Racine, a throwing star coated in poison. The inspector looks at it, then returns it with orders to take it to the laboratory to determine the poison. However, when we see Racine on the operating table, the star is shown, lying in a puddle of blood on the operating table, as if the doctors just now had pulled it out of him.
Revealing mistake: Obvious stunt double for Susan Lucci in the skinny dipping pool scene. The stunt double's hair is longer and straight while Susan's goes past her shoulders only some, has bangs and is slightly curled.
Continuity mistake: Nina returns home and starts looking through some mail whilst DeeDee walks into the room and is startled by seeing her. When DeeDee says "You're home", Nina picks up the mail after temporarily putting it down and her left hand is shown holding the envelopes by the left hand side. When the shot cuts, her left hand is suddenly touching the bottom of the envelopes. (00:03:55)
Visible crew/equipment: Whilst the group of Southeast Asian men are walking through the hair salon, there is a shot that starts with a male hairdresser wafting a blanket, that pans over to the group of men and then the camera rotates around the man holding a little girl. Immediately after the camera passes the man and girl, the camera very briefly holds on another man waving to an employee. Just as this happens, the reflection of the cameraman can be seen in the mirror to the left of the shot. (00:31:30)
Factual error: Set in 1955, Tom Holman enters a construction site with an orange warning sign. Prior to 1971, construction signs were yellow.