A Dark Knight: They Who Hide Behind Masks - S4-E3
Continuity mistake: A stack of papers are on the left side of Penguin's desk as he walks around the desk to speak with Barbara, but when she leaves, the papers have disappeared.
A Dark Knight: They Who Hide Behind Masks - S4-E3
Continuity mistake: A pair of scissors covered by a square of gauze bandage is next to Alfred's arm, but in the following shot the gauze is missing.
Heroes Rise: All Will Be Judged - S3-E19
Continuity mistake: Gordon's pistol switches between shots from higher to lower and higher again.
Heroes Rise: All Will Be Judged - S3-E19
Continuity mistake: The crowbar held by the Riddler instantly changes position from higher to lower and back again.
Heroes Rise: The Primal Riddle - S3-E17
Continuity mistake: Harvey Bullock removes his reading glasses twice while looking at Frank Gordon's crime photos.
Heroes Rise: How the Riddler Got His Name - S3-E15
Continuity mistake: Edward Nygma rolls gas canisters down the aisle at the Gotham Police Academy speech, the canisters land on their sides, then suddenly they are standing upright, spewing gas.
Continuity mistake: When Alfred walks into the cabin, gun drawn, his right hand is already bloody, despite the wounding happening 5 seconds later.
A Dark Knight: A Beautiful Darkness - S4-E13
Audio problem: Near the start, as Gordon tells the crook "how about you exercise your right to remain silent", the shot cuts and we can hear the audio from the different take which hasn't been spliced in properly. As a result the line actually is heard as "right to remain silent-silent."
A Dark Knight: Queen Takes Knight - S4-E11
Continuity mistake: When Bruce puts his emancipation papers in front of Alfred, he also sets a pen next to them. When Alfred picks up the paper, the pen is gone.
Suggested correction: The pen is still there.
Watch the scene again and point out where the pen that was next to the papers is. And Alfred never picks it up before picking up the papers.
Revealing mistake: The chest of the "dead" girl on the autopsy table moves due to her breathing, and her eyelids move twice. (00:15:20)
