At one point, Rob rushes to the phone and dials a number. However, actor Dick Van Dyke quickly realizes that he was supposed to first look the number up in the phone book. As he's waiting for his call to be answered, he quickly rifles through the book, "finds" the number and says, "Yeah, that's the right one."
Dick Van Dyke mentions Marge Willet who was high school sweetheart.
Goof: Laura has no idea who Doug Wesley is but still immediately dials his phone number from memory when asked.
Because of her nervousness & the pills, Laura called Rob's mother, "Moo-Moo", twice!