Pilot - S1-E1 Continuity mistake: In the opening, we see Dewey's cold feet. Two shots later, his legs are in a different position. (00:00:20) Yoshi
Pilot - S1-E1 Revealing mistake: At the start, when Lois tells Hal to raise his arms so she can shave his armpits, if you look at the bottom of the screen you can briefly see that Hal is wearing something to cover up his privates. (00:02:10) Yoshi