In "Housecalls," the exterior of Gerheart's house looks a lot like the quilt store (that was owned by The Stitch Sisters), in the episode "The Quilt Club."
Eustace: I hate Scotland!
We learn that Muriel can play the sitar. But she played it in "Courage in the Big Stinkin' City "and "Dr. LeQuack Amnesia Specialist".
Rumpledkiltskin is shown sitting in the audience in "Aqua-Farmer."
This is the only episode of Courage in which both segments have a title that is only one word.
In "Housecalls," you see the front of the basement door for the second time. The first time in "The Shadow of Courage."
The first episode to finally show Eustace and Muriel's last name, Bagge.
The house that comes to life and forbids the man from having neighbors is similar to the living house in the movie Monster House, which would premiere at the end of this series.