A Dark Knight: Things That Go Boom - S4-E10
Continuity mistake: When Pyg slices the inmate's throat, the left side of his face is clean. But in the next shot of him, the left side is covered in blood splatter.
Continuity mistake: At the end of the episode Fish is standing at a puddle, with three long puddles striped in front of her. After Falcon sits down with her, the camera pans back again showing where she was standing. All 4 puddles have suddenly evaporated and the additional puddles further ahead are almost gone. (00:41:05 - 00:42:10)
A Dark Knight: They Who Hide Behind Masks - S4-E3
Continuity mistake: After Alfred finishes sewing Bruce's hand, he places a square of gauze bandage on the scissors closest to his arm. The next shot shows the gauze not covering the scissors.
A Dark Knight: They Who Hide Behind Masks - S4-E3
Continuity mistake: Alfred stitches up Bruce's hand and pulls the scissors holding the stitch up high, then the next instant shot the scissors are much lower.
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 Bruce follows Cat to the roof top he jumps after her. He runs and steps onto the ledge with his left foot. When the camera angle switches it shows Bruce jumping off his right foot instead. (00:18:10)
Continuity mistake: While Alfred consoles Bruce over the death of Karen, Bruce's head immediately changes position depending on the angle of the shot.
Continuity mistake: During Barbara and The Lady's meeting in the club, The Lady's glass is on the table. The next shot The Lady is holding her glass off the table.
Continuity mistake: When Alfred leaves the garbage dump and tries to commandeer the car, the driver's are already wet from a previous take before Alfred throws him on the wet road.
Continuity mistake: When Jerome get stabbed in the neck, in the first shot the blood comes from his mouth and goes towards his eye. In the next shot, there's no blood trail going to the eyes, but instead to his cheeks. (00:34:50)
All Happy Families Are Alike - S1-E22
Continuity mistake: When Moroni arrives to kill Falconi, the number of turns of rope around the hook holding Falconi changes. First it is just one loop from the front, then the shot changes to the back and it is two. The shot changes to the front again and now there are three loops of rope around the hook.
All Happy Families Are Alike - S1-E22
Revealing mistake: When Falcone is attacked with a bazooka, notice how none of the chickens in the cages move a single muscle with the explosion right next to them.
Continuity mistake: When Dr. Thompkins is first introduced to Bullock, he reaches backward over his head to shake her hand. The shot changes and he is suddenly reaching around his body instead.
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."
Answer: Tabitha got her hand sewn back on, Butch didn't.