The Beauchamp house was located in Sierra Madre.
This marked Maureen McCormick's first regular TV role since The Brady Brides (1981). McCormick had struggled with substance abuse, but she had gotten sober, recently began taking Prozac, and was genuinely having fun making the show. The ratings weren't as strong as the network had hoped, so they decided to drop her after 11 episodes and retool the show. Even during her irresponsible cocaine days, McCormick had never been fired before, and she remarked in her autobiography that it hit her so hard that she probably would have committed suicide if not for the Prozac.
In episode twelve, "Grumpy Young Men", Tommy Hickley (Casey Beauchamp) didn't know when exactly to come out in the last scene. You can see him poking his head out of the door at one point.
During the filming of episode seven, "One Dog Night", Mike Damus (Marty DePolo) had an accident and fell.
In the show's original pilot, Jordan Brower played the role of Steve. Corbin Allred was ultimately given the part, and Brower was reduced to portraying cool classmate Jordan Lubell. Although his part was drastically scaled back, Brower was frequently featured in the show's advertising, and ABC even released numerous promotional stills from the original pilot episode, just to create confusion.