Continuity mistake: During the trip to California, the vehicle changes at least 3 times.
Plot hole: In the pilot Jimmy finds out Lucy is pregnant while visiting her cell. In S2 E21 (Inside Probe) he finds out while taking to Lucy on the prison phone.
Continuity mistake: In the scene in the kindergarten when Hope is chosen for kindergarten scholarship, when the director is repeating Jimmy's lies, Jimmy hides his left forearm behind his back, but in the next scene shot from behind, his right forearm is behind his back.
Continuity mistake: When the female serial killer is struggling with Jimmy, the knife she is carrying switches hands.