Other mistake: While Dexter's searching for info on Travis Marshall on his laptop, he opens the DMV Records window with an image of Marshall's driver license, and in the closeup at the bottom of the license it reads "Operation of a motor vehicle constitutes consent to any sobiety test required by law," with the word "sobriety" missing the letter "r." Additionally, under the image of the license it reads "Issued: 10-12-2006", but on the actual license image it reads, "DOB: 11-24-1977, Issued: 09-23-1990, Expires: 09-23-2012." So that means Marshall was not even 13 yrs old when he got his license, and the license won't expire for 22 years. Also, when Brother Sam knocks on the door Dexter clicks back onto the MOA website, and if you care to pause the screen note the word "Exibit" is missing the letter "h." (00:18:50)
Dexter (2006)
1 other mistake in season 6
Starring: James Remar, Michael C. Hall, Jennifer Carpenter, David Zayas
Dirty Harry - S4-E5
Continuity mistake: When Dexter listens to Officer Lundy's tape recording, we hear Lundy say that the Trinity killer's weight is 190 to 200 pounds. When we saw him recording that, he said 200 to 220 pounds.
[MC Hammer's "U Can't Touch This" playing.]
Former Classmate: Come on, Dexter. It's hammer time.
Dexter: [internally] I have no idea what hammer time is. Or how it differs from regular time.
More trivia for Dexter
Question: The DNA test is a match, but later in the 2-3rd season we discover that Harry (foster father) had an affair with the real mother. Is Harry the real father and takes him but not his brother in because of that or not?
Answer: No, Harry is not the real father. While he did have an affair with Dexter's biological mother (Laura Moser), this was when she was his C.I. Dexter was already born at that point.