Continuity mistake: The gun in Peter's first cutaway vanishes when the stage goes dark.
Continuity mistake: When Chris is saying about the Army being awesome, there is nothing green on his plate. When the shot changes, something green has appeared on his plate. (00:01:20)
Continuity mistake: At the start, Chris is sat next to Peter at the table with a visible gap between him and Meg. When Lois stands up, Chris is not closer to Meg as the gap has disappeared. (00:02:20)
Continuity mistake: When Stewie is talking to the army recruiter, there is 2 stacks of paper on the desk. When he signs up, one of the stacks has disappeared. (00:07:10)
Continuity mistake: When Lois bends down to pick up the CD off the floor in Chris' room, the items around the shirt on the floor change between shots. (00:16:20)
Continuity mistake: Stewie and Brian shoot themselves in the foot. Next shot the holes have disappeared. (00:18:50)
Continuity mistake: All the army men including Brian and Stewie have USA symbols on their arms, but when Stewie and Brian talk to one of them, after they shoot each other in the foot, the USA symbol on the man's sleeve is orange lines and a arrow.
Whistle While Your Wife Works - S5-E5
Continuity mistake: When Lois is helping Peter get his work done while he has the hand injury, Peter gives Lois the flip book to proofread. During this scene the phone power cord appears then disappears, and the door knob as well as the kick plate vanish then reappear properly.
Chick Cancer - S5-E7
Continuity mistake: When we see the banner saying "Happy Birthday Quinn!", the I is next to the U. However, in the close-up there is a sizeable gap between them. (00:12:50)
Chick Cancer - S5-E7
Continuity mistake: Just before Peter announces his decision to make a chick flick, the tissues on his lap change position.
Barely Legal - S5-E8
Continuity mistake: When Meg leaves the kitchen and Brian puts his coffee mug on the table, its position is constantly changing when talking to Stewie. (00:08:35)
Barely Legal - S5-E8
Continuity mistake: When Meg is introducing Brian to Meg's friends, they are at the mall sitting at a table with trays on it. There's a close-up on one of Meg's friends, and the trays and food are gone. (00:12:40)
Barely Legal - S5-E8
Continuity mistake: When Peter, Quagmire and Cleveland become cops because Joe trains them and they are all at Peter's, Joe has binoculars and is looking across the street and saying he is watching his wife Bonnie in her house. In just about every episode it is stated that Joe and Bonnie's house is right next to Peter's. So why is he looking across the street when their house is next to Peter's? (00:17:50)
Barely Legal - S5-E8
Continuity mistake: Meg gets undressed and leaves her dress by the legs of Brian's chair. When the police enter, the dress is gone. (00:18:50)
Barely Legal - S5-E8
Continuity mistake: At the end, Quagmire takes his robe off and is on the floor. When he comes back with the book for Meg, the robe is gone from the floor. (00:20:30)
Continuity mistake: At the start we see Chris place some shorts on top of an orange shirt, with a small amount of orange sticking out the side. When the shot changes, a lot more orange is now showing. (00:00:50)
Continuity mistake: When Lois finds Peter in the fridge, the papers on the fridge simply vanish between shots. (00:06:20)
Continuity mistake: As the helicopter is shown sliding down the hill, it is shown from several angles to have just a single rotor blade. However, one shot shows two rotors, one of which disappears halfway through the shot. (00:16:10)
Continuity mistake: At the start, the rug is next to Lois' feet. When Chris says about Meg's birthday, the rug isn't visible when it should be. (00:00:20)
Continuity mistake: Lois and Brian go outside and celebrate Peter's dad's death, then they come back in and sit down. Behind Lois you see the trash cans when Peter says, "But instead he called me a fat stinking drunk, those were his last words," then it cuts to a closer shot of Peter and Lois, and the trash cans have vanished. (00:12:33 - 00:12:54)