This was the first episode that Rose Marie appeared in after the untimely death of her husband, Bobby Guy, on May 27, 1964. Filming took place on August 11.
This is the only time in the Dick Van Dyke Show that we see Rob and Laura in the same bed. Rob, Laura, Buddy, and Sally are all in the same bed (fully clothed).
The "A." in "A. Chantz" stands for Amos. The name is spoken once, in the first scene.
When Rob tells Buddy and Sally that Laura steals his pillow, he's implying that he and Laura sleep in the same bed.
When the creepy caretaker who brings the firewood looks at his left wrist and confirms that it's 9 o'clock, he's not wearing a watch.