Visible crew/equipment: When Doug is getting a lift from the Priority Plus driver after being rescued from being stuck in the drive-thru, you can see the camera truck (the truck they use to film exterior road/driving shots) in the reflections of the glass windows of buildings behind Doug when the camera cuts to him.
Visible crew/equipment: In the scene where Doug has been bubble wrapped and dumped out in front of IPS, Deacon leans over talking to him and you can see a boom mike shadow over Deacon's shadow in the background.
Emotional Rollercoaster - S8-E19
Visible crew/equipment: When Carrie steals Doug's grabber then leaves the kitchen, a boom mic shadow moves on the cupboard beside Doug twice. (00:05:25)
Visible crew/equipment: Doug, Deacon, and Danny are at their lockers towards the end of the episode, and Deacon says, "Me and Danny gotta do another half shift tonight." Camera cuts, and a boom mic can be seen at the top of the screen.
Visible crew/equipment: In the opening scene, when Doug almost sits on Arthur, you can see part of the blue mat that Doug rolls Arthur off the couch on to.
Move Doubt - S8-E8
Visible crew/equipment: Season 8, episode 8 "Move Doubt": When Carrie and Doug leave Kelly and Deacon's apartment, you can see the shadow of a boom mic on the wall to their left.
Answer: Sara hasn't been mentioned in later episodes, and it suggested in later episodes that she never existed, and that Carrie is an only child. Kevin James stated that the producers couldn't think of an good plots to use with Sara, so they left her out.