Continuity: When Ben unloads Number 1 from the truck, it is almost fully erect, yet in the next shot, it is in a crouched position.

Audio problem: When Johnny starts to make impressions of advertisements he has seen on the TV, the TV magically stops making noise throughout this scene. It comes back on when Johnny has finished speaking.

Visible crew/equipment: Look REALLY closely at the mirror in the background when Stephanie is trying to control Number 5 from destroying her house. You can see a man leaning over in its reflection. Possibly the director or other crew member.

Continuity: When Johnny is exploring Stephanie's house we see 3 shelves in the background and on the middle shelf is a grey cat. In the next shot there is a black and white cat in its place.

Continuity: When Stephanie and Mrs. Sapeeto are talking after Frank leaves, we can see Stephanie's truck in the background with no Johnny 5 on top of it.

Continuity: When Johnny 5 is being pushed out of the building by the motorised bin, his mouth guard is off. But later when he is in the truck it is back on, only to come off again after he falls off the truck.

Other: When Johnny is changing his arm in the back of the Nova truck, it's quite obvious that the new arm he 'attaches' isn't realy attached at all.

Continuity: As Johnny runs from the Nova helicopter his chest plate falls down, in the next scene, it's back up again.

Continuity: The fence that Johnny falls against starts to break before he even touches it.

Continuity: A cat is ontop af a boiling saucepan in Stephanie's kitchen, yet it seems to be rather comfortable. Brave cat. [It is dry ice in the saucepan, so all animal lovers don't worry.]

Continuity: Just before we see Johnny fall off the bridge we see a shot of him speeding past some roadblocks. Look at the size of Johnny compared to the roadblocks. They are practically bigger then him. This was obviously a small replica robot filmed with the camera on the ground, to give off the impression it was the real thing.

Continuity: At the start of the film, Howard is talking to a woman and it's lovely and bright and sunny. Yet just a few seconds later we get a shot of the sky and there are lots of black clouds and it starts raining.

Visible crew/equipment: When Johnny is blocking Frank's gunshots with pieces of Frank's car, you can see the wires attached to Johnny's arms for the puppeteers to control him. In the last one, you can even see one of the puppeteers' hands.

Continuity: In the scene right after Number 5 almost drives the snack wagon into the lake and the Nova guys are shooting him, you clearly see him get shot in the hydraulic pistons which control his head motions. Yet, in the next scene (in the truck) Number 5 comfortably moves his head.