At the start of the episode Greg is seen holding the phone in both hands but when we cut to inside the family room he is now behind the table and the base of the phone is now on the table.

The unique shot of Mikes blue car driving down the street opens the first scene after the opening teaser.

It is revealed that the attic is only 2 feet tall. Hmmm ;)

At the end of the scene with Mike and Greg talking about Greg having the den the wrong background is behind Mike for his close up. It should be two flat walls but you can clearly see the shutters over the fireplace. The producers do make the efort of changing the picture though on the wall and it looks like the one seen hanging next to the front door.

Later, when the room is changed into Greg's room we get some nice shots looking into the den from the hall at the end of the den.

The school ground that is scene in this episode is a redressing of the Brady back garden. Various flower beds have been moved about and the garage has been boarded up. Normally with school scenes the show does tend to go on location so it is odd that that does not happen here.

Paul is played by Chris Beaumont who I think sold Greg the dodgy car in season 3, was in the attic episode and was Gregs rival on the other team in season 5 where Marcia dated him.

The scenes with Greg and Mike at the end of the episode with Greg dealing with the fact he isn't as old as he thought he was are quite touching.