Bloopers season 1
Pilot
When Liz is talking to Larry and Jennifer about the alien photo, you can hear Beavis (or Butthead) say, "We've gotta get rid of her." Hmm... do I smell a conspirancy?
When "Beavis" and "Butthead" fall to the ground, "Butthead's" cap falls off, but when they cut back, his cap is magically back on again.
Maria fell to the ground to avoid the gun. When she gets back up, you see that one of the antennae on her headband is missing.
When Max heals Liz, you can distinctly see that blood got onto her bra. When she looks into the mirror to see the silver handprint, her bra has no blood on it.
The Sheriff's star has 7 points on it. The rest of the episodes, however, it's 5.
Max uses his right hand to heal Liz, but in the mirror, it is a left hand.
Why would they have a Bio mid-term in the beginning of a school year?
When Max and Liz talk in the art room, notice Liz's necklace. In some shots, the necklace is outside her shirt. In other shots, the necklace is inside her shirt.
The cedar oil Maria is sniffing is actually used for acne, but cypress oil is the stuff for nervous tension.

The Morning After
Ms. Topolsky takes roll in the beginning of the class and stops at Michael. She asks Max where Michael is and then starts the lesson without calling the rest of the roll.
The color of the lockers in this episode seems to be different than the rest of the episodes.
Why is there a lawn mower in Michael's trailer home? He has no lawn!
Philip Evans changed actors after this episode.
Michael puts on rubber gloves when he is invading Sheriff Valenti's office, but when Max and Michael jump down into the dumpster, the gloves are no longer on. When did he take it off?
While Max and Liz are talking in the eraser room, Max sits in front of some soap cans. At each different shot, the cans keep moving position.

Monsters
Valenti orders a Coke, but Maria gives him diet Coke. What is she thinking?
"How's your neck doin'?" Did that sound Irish or what?
Maria and Isabel meet up with each other on the way back to school on a dirt road. Dirt? Seems like the school would be closer in to town than some little county dirt byway.
The sound effects at the end sounded more like Isabel was walking on concrete rather than good old dirt.
When Valenti is telling Maria that he's here to protect her, the straw on his drink keeps moving around or disappearing whenever they switch angles.

Leaving Normal
When Isabel is working at the Crashdown Café, you see her putting her order booklet into the right "eye" of her apron while she is talking to the guy with the "rare" hamburger. When it cuts to the angle facing her, the booklet is in the left eye.

Missing
Liz stands next to a bookshelf when she tells Max about recovering her journal. At each different shot, the book nearest to her keeps changing.

285 South
When the police officer stops Michael, look at Maria's seatbelt on Michael's angle. You'll see that it's off. When the shot is at Maria's angle, the seatbelt is off.
Watch Liz when she first talks to her parents on her cell phone. She is listening to the phone on her left ear. When it cuts to a different angle, the cell phone is on her right ear.

River Dog
When Valenti goes to Ms. Topolsky's office to talk about the break-in at Max and Isabel's house, he says that it happened yesterday. When Liz goes to Max's room to talk about going to the Mesaliko reservation (after Valenti talks to Topolsky), she says that the break-in was today.
It takes at least 3 hours to get to Marathon from Roswell. By the time they got to Atherton's dome, it was already far into daytime. It would take at least another 3 hours to get back. But... Max and Isabel made it back home before school started. Huh?

Blood Brothers
While Isabel and Liz are talking about getting Max's vial of blood, you can see that at some point, his eyelashes flutter.
In The Morning After, Max was in Geometry. In this episode, he's in Trig. How did he get a couple levels higher so fast?

The Heat Wave
When Alex and Liz are talking about how "low" Isabel is, at one angle, Liz's hands are gripping the jail bars. In another angle, her hands are on top of the bunk.

Into the Woods
When Philip Evans asks that deputy if he found his kids in the woods, the deputy says, "No, sir, sorry." Hello? That guy's supposed to serve and protect, shouldn't he be launching a search for Mr. Evans' kids?! He should be fired!

The Convention
While Max is driving Everett Hubble to Bitter Lake, you can see the shadows jumping to different places on Max's face at different angles of the scene.

Blind Date
When Max makes the heart glow, he uses his left hand. When Liz is remembering what happened between them that night at the end, he is using his right hand to make it glow.
Liz appears to have tons of red, sticky lipstick on. Not only does it stay on the whole night through 2 dinners, but when she and Max kiss at the end, her lipstick is still perfect and there is none on Max's face.
When Max is eating chips and watching Liz(incognito) Kyle comes up to him and sits down. He goes to put a chip in his mouth when he says "I'm fine Kyle." Then the shot shows both of them and Max never put the chip in his mouth but he is chewing.

Independence Day
When Michael throws rocks at the train, you can see something drop from his jacket. He even looks down at it... the scene just goes on like nothing happened...
After Maria dries Michael's hair, it is all messed up. When the scene cuts to another angle, his hair isn't so messed up anymore.

Sexual Healing
When Max and Liz first kiss in this episode, Max's hair is messed up at different shots and nice & neat at others.
How did Max and Liz jump from Biology to Chemistry so quickly?
When Max slides over the piece of paper to Liz, he is holding the pencil in the first angle. When it changes the angle to focus on his hand, he isn't holding a pencil.
When Liz is on her way to detention and sees Alex, she rushes over to him with both arms. When the angle changes so that you see the front of her, she is only holding on to him with one arm.
When Max goes into Michael's apartment and announces that Liz is coming over, you see Liz standing near the doorway before he closes the door.
When Isabel turns off the lights in Michael's apartment, you can see where they cut off to make it look like she snapped her fingers and "magically" lit all the candles by looking at Max. He suddenly changes position (it's very subtle, you have to watch it carefully).
When Liz is talking to Max on the balcony, watch Max. He looks like he's about to burst out laughing at one point.
When Max and Liz start digging, Max turns off the lamp. When he picks the orb up, the lamp is turned on again and it's turned the opposite way.
While Max and Liz are in the desert, Liz says she hears the beeping in her vision and they run to the tower. If you look at Max some of the buttons to his shirt are un-buttoned, but in the 1st shot when they are getting out of the jeep they are all buttoned to the top. Did Max and Liz get a little freaky when the camera wasn't filming?
When Isabel, Michael & Max are all in Michael's apartment.. there is a high voltage sign right behind Isabel.. to the right of the fridge. When later Michael is messing with the paddle and ball, while talking to Isabel, the high voltage sign can be seen on the wall directly behind him. And when you see the fridge shot again it's not there. What happened? Michael felt like a quick redecorate? I think not. And another thing.. why is that same high voltage sign like EVERYWHERE?

During the scene where Michael, Max, and Isabel are discussing the visions that Max is getting from Liz, Isabel is putting away groceries which are in a bag on the chair next to Max. Then in the next shot when Isabel is cleaning the glass and says "Well can't you just ask her" the bag is suddenly gone. Michael even sits in the chair where the bag originally was. The shot moved too quickly for anybody to move the bag, so where did it go?
Crazy
When Tess is over at the Evans' house, she tells Isabel, "Don't forget the extra sugar." Isabel talks to Max & Michael and totally forgets the sugar.

Tess, Lies, and Videotape
The newsreporter (who, ironically, is Thania St. John, one of the co-executive producers of the show) holds a microphone that says "8." The channel on the bottom of the screen, however, says "14."
The camera cuts off at some point of Max and Michael's fight. First, Michael seems to be winning the fight, and suddenly Max has him down against the refridgerator.
When the four of them go to save Liz at the Harding house, it's foggy. When they come out of the house, it's clear and there is no sign of fog at all.

Four Square
Liz treats the Aries constellation with the current date, which was 5-27-00. That day is a Saturday. So, what are they doing at school?
Since when did James Atherton change his name to William?

Max to the Max
Max/Nasedo pulls Liz into the bus at the end and he is the first to get in. When they cut to the inside of the bus, it's Liz who gets in first.

The White Room
Max says that he lives in 6025 Murray Lane, but in Crazy, that's where Agent Stevens lived (except that was in Alexandria, Virginia). Max also had a different address in the Pilot.
Right before Bello/Nasedo comes into the morgue, the Pod Squad (excluding Max of course) are talking. Look at the dead agent, you can see his throat move at one point.
When Nasedo changes Michael's clothes, his jean jacket changes into that FBI suit. When the angle of the camera is focused on Nasedo, you can see that jean jacket still on Michael.
Why is there a security scanner on the inside?

Destiny
The location of the opening of the cave is different from the one in Max to the Max. In Max to the Max, it's on the left, but in here, it's on the right.
When they're carrying Max out of the military base, he puts one of his arms over Liz and another over Isabel. At another shot, Isabel has to put his arm over her again.