The Loring estate is the same house that was used in The Big Valley.
The Loring estate seen in this episode was later reused as the Haskell estate in "Love of a Bad Woman" later in the season.
The painting hanging on the wall in the opening scene is the same portrait of Annie that was the subject of the previous episode, "The Lady on the Wall."
The painting in the restaurant of the Carlton is not the painting from The Lady on the Wall (1960). This painting has a woman in a light colored dress and light colored hair. The picture in "The Lady on the Wall" has a dark dress and dark hair.