Enter Batgirl, Exit Penguin - S3-E1
Plot hole: When he abducts Alfred, believing him to be a minister, Penguin suffers a peculiar memory lapse. He's encountered Alfred twice before in previous episodes, even kidnapped him once before (knowing full well that he was Bruce Wayne's butler). Yet here, he fails to recognize Alfred at all. (00:12:30)
Time Machine - S1-E5
Plot hole: After Al guests knocked out by the Russian dancer, he is woken up by his friends. However, according to the series events before this, Terri Garr should have found him first.
Worlds Collide: Part 3 - S3-E6
Plot hole: In their previous encounters with the Triceratons, the Turtles had to learn the hard way that the Triceratons breathe not oxygen but a combination of nitrogen and sulfur, which is detrimental to most Earth lifeforms, and thus had to wear special rebreathers. When the Turtles, Splinter, April and Casey enter Zanramon's throne room along with Traximus, none of them wear any breathing equipment to protect themselves from the hostile atmosphere.
Gold Fever - S2-E2
Plot hole: Roscoe and Enos are chasing the boys. They are well ahead of the Sheriff and go up into a semi with a conveniently made ramp to lose the cops. The dust was dissipated enough that Roscoe, coming up from the rear, could have seen the General in the trailer. Roscoe couldn't be that blind. Plus the trucker couldn't miss the movements of the truck settling down from the sudden adding of two tons.
Normal Boy/Birth of a Salesman - S1-E3
Plot hole: Throughout the show, many characters state that Jimmy was responsible for the meteor almost destroying Retroville in the episode "Normal Boy", however, how would anyone even know that? The meteor was put on course after being hit by some kitchen objects shot into space by Jimmy's orange juice machine. Neither Jimmy nor his parents or anyone saw the objects go into space, much less witness them causing the meteor head straight to earth, especially since the meteor wasn't detected until the next day.
Independent Dependents - S1-E7
Plot hole: When Helen goes into the air ducts, she simply removes the grates. They would not be loose like that, they would be firmly attached. When the team enters the basement they go through an ordinary door by picking an ordinary lock. A very high security installation like Axe Industries would not have such an insecure entry, even into the basement.
Plot hole: Gracey loses the Dean while she's sleeping, but Ms Loon is revealed later to have taken the Dean, so how did she get into the room?
Plot hole: If Andy really did enlist into the Army Reserves and "forgot about it" like he claimed a warrant for his arrest for desertion would have been issued, which the police would have seen when he was arrested for pot possession in the episode "Lude Awakening." After seeing the warrant, the police would have called the Army, and he would have been returned to military control to face desertion charges. He would not have been released and sent a letter a few weeks later simply telling him to report for duty or face military prison; the option to report for duty would have no longer been available when he was gone long enough to get put in deserter status.
Plot hole: In season five, the show depicts the aftermath of an Electoral College tie. The procedure in this case should be the House holding subsequent ballots until a president is elected. On the show, however, Tom James convinces the Speaker of the House to hold one ballot, and then not vote again. James' plan is to win the Senate vote for VP, then act as president for four years before being elected to two full terms as actual president. James is outmaneuvered and his rival Montez is elected VP, and subsequently acts as president for the remainder of the series. After season 5, the show makes no mention of the House ever taking up a vote for president again, and the show simply treats Montez as the actual president. A Speaker of the House blocking the election of a new president would likely cause a political uprising from supports of both candidates, and both candidates would rightly take to the airwaves to demand a new vote. The idea of a power-hungry politician such as Selina, who uses every trick in the book to promote herself and elevate her own power, putting up no fight is just bizarre.
'Unmei no sentaku' mitaina - S1-E6
Plot hole: Akito's attack is point blank, on a ship part of a fleet with Distortion Field activated (basically, they have shields, like the good guys' robots). The explosion he causes is according to Ruri's damage report big enough that it managed to vaporize 80% of the ships they were facing, but his Aestivalis and the other 3 right floating nearby make out of it literally without a scratch. (00:05:10)
Video Mania - S3-E6
Plot hole: The plot for this episode is that Mark reluctantly tries out video games for the first time and soon becomes addicted to them. However, the season 1 episode "All in the Family" showed him to already be an avid gamer.
Plot hole: When Beverly is killed the killer shuts off the main power switch which would have turned all the lights off in the house, not just those in the bathroom. (01:31:00)
Plot hole: It is revealed that Malia has been living as a coyote for eight years but earlier in the season it's shown that all shape shifters lose their powers and becomes human during a lunar eclipse, which happened in the midseason finale. So why didn't Malia turn back?
The Aptitude Test / Oskar Gets a Job - S3-E9
Plot hole: Mr. Simmons asked that each student put their name on the test folders, but the folders already had names on them when he handed them out.
Plot hole: In the pilot episode Chuck mentions his mother speaking as though she is still alive and he knew her but in later seasons it is reveled that she supposedly died while giving birth to Chuck and he never knew her.
Plot hole: Dumb Donald chooses not to play hookey with the rest of the gang. He instead goes to school. The gang is even worried Dumb Donald may, "Rat them out" to the school. Yet throughout the episode, Dumb Donald appears/disappears with the gang as they are skipping school.
Home Again - S2-E9
Plot hole: Old Ash travels back in time to 1982 to snatch the Necronomicon before Young Ash ever finds it (which should, presumably, erase all of the evil events from the original Evil Dead film right up to the present). Upon escaping the cabin, Old Ash finds that the timeline has self-corrected, and his amputated right hand has reappeared on his arm. But he is still in the 1980s. If the timeline had truly self-corrected, then Old Ash's car, his friends, and he himself would have vanished instantly from the 1980s, because the purpose of their mission never existed.
Jiu-Jitsu, Bubble Wrap, and Yoo-Hoo - S1-E17
Plot hole: Near the start we see Sheldon using physics to try and take down Tam. This completely goes against all of Sheldon's phobias about touching people, especially socks. Even before this episode he has shown his displeasure at the thought of touching people. (00:05:00)
The Amazing Psych-Man & Tap Man, Issue No. 2 - S6-E4
Plot hole: The flashback involves Young Shawn and Gus getting ready to go to a comic book convention, Shawn in costume, with his father's consent. This contradicts the flashback in "Shawn Vs The Red Phantom," where Henry won't allow Young Shawn to even read comic books or play superhero with a towel around his neck.
Plot hole: There is no way that Zoey could've seen those boys hanging Chase's bike from a tree. She was way far from the window to even recognize his bike, and when Chase looks through the window, the bike was just now being lifted from the ground.
Suggested correction: Time travel is not real. The rules of it are dependent on what the writers deem fit. Ergo, this isn't a plot-hole.
TedStixon
By that rationale, plot holes don't exist in any films, because the screenwriters are making all the rules. But, of course, plot holes do exist because screenwriters forget their own rules. In this case, the screenwriters chose to go down the path of correcting the Evil Dead timeline, but then they forgot to correct the timeline.
Charles Austin Miller
Baal was messing with time.