Episode Four - S5-E4
Continuity mistake: When Sean, Beverly and Matt are brainstorming TV show ideas, Matt writes "whores!" on the whiteboard. His handwriting changes depending on the shot.
Episode Six - S5-E6
Continuity mistake: When Sean, Beverly and Matt are at dinner, the wine bottle is either next to the TV script or on top of the TV script depending on the shot.
Continuity mistake: In the opening scene, Sean and Beverly are on the phone with Eileen Jaffee. In some shots Sean is holding the phone upside down, and in others he's holding it the right way up.