They're Tearing Down Tim Riley's Bar - S1-E17
Continuity mistake: When William Windom comes into his office, we see a stone wall in the background, with a wall clock, a painting and a credenza, but when Bert Convy comes in through the same door later, the background is completely different. And again, when William Windom leaves his office after he's been fired, the background has changed again. (00:03:30 - 00:07:10)
They're Tearing Down Tim Riley's Bar - S1-E17
Continuity mistake: When Randolph Lane swivels in his chair, his hair changes from slightly mussed to disheveled.