Chapter 26 - S2-E13
Character mistake: Typing letter to the President on old typewriter, Frank thinks "stared at desk" but types "started at desk." (00:24:00)
Chapter 39 - S3-E13
Character mistake: When Dunbar holds up a copy of the Wall Street Telegraph, there is a spelling mistake in one of the stories above the masthead. It reads, "NIGHTMARE: Woman sleepwalks on major higway, dies". (00:08:50)