Continuity: When No.2 is writing on the blackboard, in Question A. The capital letter "F" changes several times between the long shots and close ups. Also in Question B. The position of the first "T" in the word together also shifts position during the same shots, showing that the scene was filmed twice.

Continuity: In the court room scene, Number 6 has wind-blown hair in the master shot, but is nicely combed up and neat in all the close-ups.

Deliberate "mistake": The credits list "Number 86" as played by John Maxim. But no such character appears in the episode. Apparently, 86 was left on the cutting room floor, but the titles weren't altered accordingly.

Continuity: The sling that's been around the Butler's arm and shoulder vanishes after he fans Number 2 with a towel. It's back a few shots later.

Revealing: When they're "playing" on the swing, Number 6 has his hands on the Butler's shoulders, and the Butler is wearing gloves - yet there's a close-up of someone's bare hand holding the rope.

Continuity: When Number 6 is pushing him on the swing, the Butler's hands and arms change positions instantly between shots. One moment, he's holding the rope with his hands: in the next, he has his elbows crooked around the ropes instead.

Continuity: During the interview, the Butler puts a coffee pitcher down beside Number 6. In the next shot, it has disappeared.

Continuity: While he's making his graduation speech and demanding to know why Number 6 resigned, Number 2 has a mortarboard tassel wardrobe malfunction: it keeps changing sides between shots.