(at around 15 mins) When the grill bursts into flames and frightens Doug, he yells "yuspa". Cathy Yuspa is an Executive Producer for The King of Queens.
At the taping of this episode, when Doug is looking at the computer and says he's watching a "steak eye view", someone from the studio audience suggested changing the ling to "ribeye view". The writers and producers huddled briefly to consider changing the line before deciding to go with the original scripted line.
After Danny completed the first phase of work on Dr. Crawford's lawn, he stops by the Doug and Carrie's home and gives her a tree to plant as way of thanks for her support. He says the tree is a prunes persica "or as you kids call it, an apple tree." In reality, the prunus persica is a peach tree.