Goofs

Donald Pleasence's character is called B.D. Hoffler. In the credits, his character is called B.D. Brockhurst.

On the contract signed by the band, Bob's signature changes from one shot to another.

When Mean Mr. Mustard serenades Strawberry Fields, he puts his teacup down. In the next shot, he puts it down again.

When Billy Preston as Sgt. Pepper descends from the top of City Hall he knocks down a large banner reading "Sold by Mustard Realty." But by the time he lands, the banner has disappeared.

During the Steve Martin/Maxwell Edison scene, the 3 Bee Gees are pinned face-down when the ballerina nurses are finished beating up on them. When the camera returns to the groggy Bee Gees they are lying face-up.

At the 51:52 mark, when B.D. Hoffler (Donald Pleasence) reaches his right hand across the front of the robe being worn by Lucy (Dianne Steinberg), his hand accidentally brushes the edge of her robe, very briefly exposing her left breast. It only lasts for about one frame and is very difficult to see.

During the Aerosmith scene, Steven Tyler's microphone does not have a cable, and doesn't appear to be wireless. In the closeup, you can see bare pins where the cable should be connected.

While Earth Wind and Fire are performing, the trumpet player is holding his instrument in the air while you can hear a trumpet playing.

The bass drummer in the original Sgt. Pepper's Lonely Hearts Club Band is out of time with the band. He is also clearly not hitting his drum.

Joe Perry appears to be lip-syncing during the Aerosmith scene. At one point, he gets off track.

When Sergeant Pepper (Billy Preston) is flying around, wires are clearly visible.

Mean Mr. Mustard and the Brute could have stolen all of the instruments from City Hall one trip rather than making several.