Ready, Willing, and Disabled - S3-E15
Continuity mistake: When the guys are at the bar, Joe's glass of beer has foam at the top. When he starts crying, it completely disappears seconds later.
A Picture Is Worth 1,000 Bucks - S2-E11
Revealing mistake: When Brian is shaking his head saying he will never go to the theater with Peter again, you can see part of his neck is missing. (00:09:10)
Continuity mistake: When Brian is with Stewie asking for help, we see a set of blocks on the table, including a set of 3 stacked up. In the next shot, the 3 blocks vanish.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter is talking to Mr. Weed at the baseball game, the shade of Peter's hair color changes from lighter to darker and vice versa multiple times. (00:03:35)
Continuity mistake: Kevin takes his jacket off at the dinner table. His shirt says Ed Hardy. The name wasn't on the shirt until he took his jacket off and it disappears again when he puts the jacket back on.
Baking Bad - S13-E3
Factual error: Everyone donating blood in this episode is being hooked up to bags already full of blood. Peter donates yet the bag he's hooked up to is already full. Really hazardous.
Death Lives - S3-E6
Continuity mistake: The steering wheel in Cleveland's van changes color. First it's black. Then it changes to grey when Peter gets in.
Brian's Got a Brand New Bag - S8-E4
Continuity mistake: Towards the end of the episode, Brian walks in with Rita's soup. Notice there are no pill bottles on her nightstand. As soon as he sits the soup down, 3 bottles appear out of nowhere. Then, after Brian gives her the pills, the bottles disappear again. (00:03:02 - 00:03:28)
'Family Guy' Through the Years - S16-E16
Factual error: In the scene at the Disco, Peter and Quagmire both transpose "Viet Cong" but with "Donkey Kong." However, the segment is supposed to be taking place in 1973, meanwhile "Donkey Kong" wasn't released until 1981.
Other mistake: Joe salutes Quagmire's Dad. His legs are paralyzed, yet he uses them to push himself backward in his wheelchair.
Screams of Silence: The Story of Brenda Q - S10-E3
Other mistake: This episode is the only one in the entire series where there's a peephole in the door.
The New Adventures of Old Tom - S14-E18
Continuity mistake: Peter goes to the roof where Tom is debating jumping. He has orange fingers because he ate a Doritos taco. He licks two fingers but next shot shows them all clean.
Factual error: As soon as Lois and Peter board the ship it starts moving. This does not happen in reality.
Continuity mistake: In the Clam when Brian says about he knows what's going on, Quagmire disappears from behind his drink on the table. (00:10:00)
Valentine's Day in Quahog - S11-E12
Continuity mistake: Just as Meg's date is about to leave the motel, the level of ice in the bath changes. Note its position in relation to Meg's Scar. (00:08:30)
Continuity mistake: The colour of the ropes tying the ladders together changes from white to yellow. (00:11:00)
Factual error: There's no way for the Griffins to climb clear to the top of Mt Everest. It takes months to prepare for that and oxygen tanks. This episode is one whole factual error. That and it costs 30 grand or more per person.
Answer: Mort is Jewish, and Walt Disney was said to be antisemitic. So it would make sense in a Disney universe all the inhabitants would share his supposed beliefs.
MasterOfAll