Continuity mistake: At the bar, Mickey has something in his hand. It disappears and reappears in the space of three shots.
Continuity mistake: When the angry driver is smashing Fiona's windshield, she is desperately trying to roll her window up. In one shot she is rolling it up but it cuts to outside and the window is completely down.
Like Father, Like Daughter - S4-E3
Continuity mistake: Liam notices the dog tied up and says "doggy." In a closer shot he reaches his arms up. Cut to a wide shot and his arms are down.
Like Father, Like Daughter - S4-E3
Continuity mistake: Frank and Carl are scoping out his supposed eldest daughter. In the initial shot it is raining but in both angles of the close up shots, it is snowing. The scene ends with a wide shot and it's raining.
Continuity mistake: When Debbie is in her room crying about Matty, Fiona comes to the door. Debbie gets up to open the door with nothing in her hands. As she returns to the bed, she's holding a pillow.
Continuity mistake: Near the end of the episode, Sheila leaves to go to the reservation. She gets in the car and her hair is in her mouth. We see the driver and it goes back to her. Her hair is no longer in her mouth.
Continuity mistake: When Debbie sits down on the couch with Carl and Liam, Liam is sitting on Carl's lap with Carl's left arm around him. When the camera angle changes, Liam is sitting next to Carl, and Carl's hands are in his lap. When the angle changes again, Carl's arm is once again around Liam. It changes back one more time to Liam sitting next to him before Carl gets up to answer the door.