Continuity mistake: When Carl is staying with the son Earl in his motel room after he separated from his wife and starts going back and forth for the room, there are two socks on the floor by the bed, one of which changes position in another shot.
Continuity mistake: When Earl's mother is in the bathroom stall we see she has a tiny bit of toilet paper on the roll next to her. As Joy puts her head underneath the stall the amount of toilet paper is now much longer than before. It goes from half a square of paper to about 2-3 squares of paper.
Earl and Joy's Anniversary - S4-E10
Continuity mistake: Earl yells "Fire!" from inside the Crabshack's restroom. As he does, a woman with dark brown hair and wearing a blue plaid shirt gets up from her table to evacuate the restaurant. A long shot outside the restroom of Earl yelling "Fire!" has the same woman getting up and leaving again.
Reading Is a Fundamental Case - S4-E12
Continuity mistake: In episode 11, Earl's list item was to give back the blue door, but in this episode he still has the door.
Suggested correction: That's because the episode was aired out of order. This episode was the 9th one produced (production code 4ALJ09), but aired in between the 12th and 13th episodes produced.
Continuity mistake: In the scene where Randy and Arlen are sitting in the bar, and Randy is telling Arlen how to be a better little brother, take notice that the beer bottles on the table increases in number, and the arrangement of the bottles changes too.
Continuity mistake: While Darnell's farther has his back to Earl, Earl tries to jump him; Darnell's father hits Earl, and Earl falls to the floor. When Earl gets up, take notice that Earl has a cut on his lower lip; the cut goes from a vague light red to a dark red in several quick shots.
Witch Lady - S4-E21
Continuity mistake: In the scene where Randy is rolled down the basement steps in a bag, there is no foot protruding from the bag; once Randy reaches the bottom, the foot is sticking out.
Witch Lady - S4-E21
Continuity mistake: When Joy is rolled down the basement steps in a bag, her feet are not protruding from the bag; upon landing, you can see that the feet are now showing.