Continuity mistake: In this episode, Doug looks out his bedroom window and sees his parents and Arthur standing on the porch by the front door, but in season one, the episode when Richie sleeps with their neighbor, Carrie and Doug's bedroom window faces the Sacksi bedroom window.
Other mistake: When Doug is drawing a picture to explain to the nurse why he is there, a man purchases a beverage from the "Hot Drinks" machine behind Doug. The drink is ready unrealistically fast and the man immediately takes a sip from an obviously empty cup. Also, if the machine actually worked he would have scalded himself, as those machines notoriously produce extremely hot beverages.
Add timeThe Minister
Plot hole: Spence comes in with a pizza and says, "Let's hit this pizza hard and get out of here." But then later we find out there's a laptop in the pizza box. What if the guys actually wanted a slice? Also, after the guys leave for the movies, Carrie or Arthur would've seen the laptop in the pizza box.