Continuity mistake: Trinity closes the cash register before answering the door. After McGee leaves its suddenly open again. (00:24:20 - 00:25:15)
Plot hole: In season 6 episode 13 Jax comes home and finds Tara. He picks her up and holds her. In this episode Gemma is looking at the crime scene pictures that Unser has. They show Tara in her original position on the floor when Jax finds her. Not possible because Jax moved her.
Continuity mistake: When Patterson first visits Toric at the hotel he is on the second floor. When Roosevelt visits to investigate the room is ground level.
Continuity mistake: When Happy is captive with the Chinese, there is a scene they are watching cartoons. Initially Happy is shown eating takeout without a drink. In the next shot, a beer is sitting on the box.
Visible crew/equipment: When Roosevelt is in Toric's room at the motel, you can briefly see a person holding a camera in the left mirror. (00:42:43)
Deliberate mistake: In the chase scene after Jax shoots the unnamed driver, the SUV crashes into traffic. You can see the car that the SUV hits is empty. (00:26:18)
Factual error: When Tara goes into her office there's dried blood on the carpet from her faked miscarriage. Considering it's a bio hazard that happened days ago it would've been cleaned up and sanitized since it's a hospital.
Suggested correction: The blood is on carpet which is very difficult to clean as it's such an absorbent material. The carpet will keep the stain, but as long as it has been thoroughly sanitised there is no issue here. Yes, the carpet could have been replaced, but hospitals don't generally keep spare carpets laying about. Plus the fact that her office isn't a treatment area, there isn't much of a hazard anyway.
Doctor's office with a blood stain on the carpet? Highly unlikely.
Highly unlikely doesn't make it a mistake.
Stolen Huffy - S5-E4
Continuity mistake: After Chibs says "I don't think you want to be doing this for an audience," Jax holsters his pistol twice. (00:24:40)
Revealing mistake: Nero sits on a curb along the street sobbing after finding out about Gemma. He scratches at his arm and scrapes off a part of his tattoo. (00:56:10)
Other mistake: At the end of the previous episode, the ornate SAMCRO table is shown in the ice cream shop clubhouse. Then in this episode, the same table is in the Red Woody meeting room. Can't be a second table - it's got the original's burn damage from the season 6 clubhouse IRA bombing.
Continuity mistake: When the club is voting in the 3 Nomads, the patches change from Nomad, to Redwood, back to Nomad. before the vote.
Revealing mistake: Piney, who has supposedly been dead for days, swallows and moves his mouth while Opie lies crying beside him. It is while Unser is telling him to go see Gemma's face.