Continuity: When Emma gets into Jay's car for the first time, she has random braids in her hair. When she gets home and is talking to her parents, she has no braids. When she goes to the ravine, she has braids again.

Continuity: In the episode "Our Lips are Sealed part 2" when Alex and Hazel are in the coffee shop at the mall waiting for Paige, Alex is playing with her spoon. She is looking down, but when the angle changes she is looking up at Hazel.

Plot hole: In the start of season 4 we meet Liberty's little brother, Danny. J.T. and Manny are making fun of him because he is new to the school and is starting out. If he is starting out, then he should be in the 7th grade, because it is stated in the first episode that the school changed into a 7-12. Liberty, J.T., Manny, Emma,Toby etc. are all in the 10th grade so how does it end up that Danny is a grade below Liberty?

Continuity: In "Don't You Want Me, Part 2," when Emma is about to explain to Manny that she might be pregnant, she is bent over unfolding some clothes. Then the scene changes angles and she is in a completely different position.

Plot hole: In "The Mating Game," Emma is getting people to sign a petition to get tampon machines in the girls' bathroom. But in the episode "Mother & Child Reunion," when Joey and Caitlin are in there, there's a tampon machine. So you can see that they took it out or just neglected the fact to support the plot of this episode.

Visible crew/equipment: In the episode "Gangster Gangster," when Sean is showing Jay and Alex how to do something on the car, he is talking about him modding up his car for free. You can see a camera and crew threw his reflector glasses.

Other: In the episode "The Mating Game," Ashley states, "Terry, sorry about last night." Unless she was with Jimmy and Ashley, because she is referring to when Ashley yelled at Terry. But that was 2 days ago, so why is she saying "last night" when it was 2 days ago?

Continuity: In the episode "Together Forever" when Craig has to decide weather to go to college or stay with his band, he has to fill out an exception letter. When he is writing his name you can see there is nothing else on the paper, but when he picks it up it suddenly has a bunch of writing.

Continuity: In the episode "High Fidelity: Part 1" when Spinner is at Friendship Club when he is becoming a "virgin" again, Marco is helping him set up. Marco lights a candle and puts a glass over the candle and the glass is different in the far shot.