Factual error: At about 8 minutes in, Grace's ex-husband is talking about flash flooding and water mixing with electricity. He's makes a comment about going up like Gary Gilmore. Gilmore was executed by firing squad and not in the electric chair.
Jimmy's Girl - S2-E5
Continuity mistake: While Grace and Jimmy are at the pub discussing things, Grace takes away Jimmy's empty beer glass and puts it on the opposite side of the snack bowl. A few minutes later Jimmy reaches for the glass and it's 1/4 full, with ice. (00:20:40)
Hello, I'm Your Mother - S2-E16
Continuity mistake: In the opening scene Grace's coffee mug keeps changing position.
Continuity mistake: When everyone is commenting on Vic's hair at work, he has his hands on his hips. The shot changes and they are no longer on his hips.
Jimmy's Girl - S2-E5
Continuity mistake: In the final scene when Grace goes to checkout at the grocery store, she is holding her credit card. The shot changes and now the cashier has her card.
Continuity mistake: When Grace and Nadine walk into the house there is a box of laundry detergent in the background facing forwards. When Wade comes in it's turned around.
Continuity mistake: When Grace goes into the kitchen at the end of the episode she shuts the door. The next time the door is seen it is open.