Plot hole: Gracey loses the Dean while she's sleeping, but Ms Loon is revealed later to have taken the Dean, so how did she get into the room?
Don't Let the Good Life Pass You By - S3-E8
Plot hole: When Janet and Michael visit Doug Forcett, they realise his lifestyle, like drinking his own urine and only eating lentils and radishes, is not the "blueprint" they imagined. However, Janet should already have known all of these details, due to knowing everything about everyone in the universe, so a) she could have told Michael this without visiting Doug, and b) she should not have been learning all this for the first time herself.