Our Father - S3-E1
Revealing mistake: During the crime scene investigation where Dexter, Masuka, Debra, and Angel arrive, a production mistake is visible. The victim, who is supposed to be dead, can be seen breathing - the back moves slightly while the camera is still on the body. (00:52:45)
Revealing mistake: The dead body appears to be moving its eyes. (00:10:05)





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.