Continuity mistake: Herb and Judith leave Charlie's residence after handing over Jake. Charlie peeks out from the corner upstairs, asking Alan if Judith has left. In that shot, no cat can be seen. As Charlie then begins to walk downstairs, he accidentally steps on one. (00:02:10)
Continuity mistake: Towards the end of the episode, Alan and Jake return to their hotel room with a bucket of chicken and sit side by side. Once they start talking about opening a restaurant and naming it, the bucket gets noticeably closer to Alan's left arm between cuts from him to Jake.
Continuity mistake: Charlie tells the psychiatrist that apart from being constipated everything is fine and the house is paid off. However later on when Walden moves in, it is said there are three mortgages on the house which Alan can't afford (which is why Walden moves in in the first place).