When Casey shows Helen the fistful of hair she grabbed from Stuart, Helen says, "Stuart has hair now?" But they all saw him on TV at the baseball game, so she should have seen then that he had hair.
As mentioned in the episode, Stuart had gotten hair plugs.
Goof: Earlier in the episode, Mr. DeCarlo is telling Antonio about his old driver and how he worked for him for 15 years. As Antonio comes to believe that his boss is a mobster, he tells Joe and Brian that Mr. DeCarlo had his last driver killed when he wanted to quit. Brian then says "yeah, but that other guy was working for him for 15 years, you've only been working for him for a couple weeks", but Antonio never specified how long the previous driver had actually worked for.
Goofs: In this episode, Helen flashes back to when she and Joe got engaged and she didn't exactly break things off with Davis Lynch. In this flash back, Lynch has long hair, but back when this actually happened, he had much shorter hair. Maybe not so much of a goof, but as proof of when this was shot.
Goofs: After Melissa struggles with her luggage to get on the plane, no one seems to worry about the open door. Next thing you know, they're airborne.
Goof: Brian complains "how does a dog own a dog?" when talking about Disney cartoon characters Pluto and Goofy. But Pluto was best known as Mickey Mouse's dog not Goofy's.
Goof: Wings, #135, Sons & Lovers, continuity: Near the start of the episode when Roy and RJ are meeting again after six or so years, Helen & Joe talking, Helen says "There's a simple explanation...", note during "There's a" Joe's hand is on his forehead, but at the point she says "simple" his hand has warped over to cover his mouth.
When the plane is going down, Joe looks to the left at engine #1 and calls it engine #2. and looks to the right engine (#2) and calls it engine #1.
At the end of the show, Brian is sitting at the desk eating a huge container of food. The container is full to the point of overflowing. Then when it shows a straight-on shot you can see the container is almost empty. Then back to a side shot where the container is full again.
Goof: If Brian is the "Stooges" fan he professes to be he should know that Moe, Larry, and Shemp were the original three. Curly came in when Shemp left, and Shemp came back for a while after Curly had to leave over health issues.
Behind the Scenes: This may or may not be a goof, but when Bud first meets Antonio, he calls him "Tony", which is the name of the actor who plays Antonio.
Goof: Even though Antonio is dumped by Edna in this episode, he doesn't actually begin his relationship with her until the next episode, "She's Gotta Have It". That episode was supposed to air before this one, but its premiere was delayed by baseball playoffs.
Goof: It was in this episode, I believe that the "big=faced" girlfriend of Antonio's was called Edna. However, in episode #85, Antonio mentions to Fay that he has a date with Denise, the big-faced girl. Either this is a goof, or there is more than one "big-faced" girl running around Nantucket. Maybe it's something in the water?