Although the Fox press release and end credits identify Ray McCreary as Hans Christensen, the on-screen dialogue and closed captioning confirm that the character's last name is Christinger.
Trivia: Ichabod's birthday is August 18.
When Jenny enters the cell where the Wendigo is being held chained, she is not wearing a glove on her right hand. But when she puts the organ box on the floor, she is wearing one.
When Ichabod and Abbie find Joe after the first two murders, he's unconscious but wearing a shirt. Every other time he transforms, the shapechanging destroys his clothing and he's naked afterward.
The end credits misspell Tarrytown as "Terrytown" in "Terrytown Psych Nurse."
Despite Abbie's assertation to Crane that "That's the first time you ever called me Abbie", he did in fact call her Abbie in the pilot episode, when he told her, "But perhaps you were called to something, Abbie, to finish the work your sheriff started."
The plant that Crane touches as they search for the lost colony is Mimosa pudica, a plant that is truly sensitive to touch, as the leaves close up when something or someone comes in contact with them. But the leaves don't close up for days, only for some hours.
When Andy Brooks is revived in the morgue it is said to him in Greek "Ο θάνατός ήταν μόνο η αρχή σκλάβος, η ψυχή σου είναι δικό μου" when what should have been said is "Ο θάνατός ήταν μόνο η αρχή σκλάβε, η ψυχή σου είναι δική μου". Incidentally Google Translate does the exact same error when translating from English to Greek. The meaning of the phrase is "Death was only the beginning slave, your soul is mine". Also what the demon said afterwards was incorrect. "Απελευθέρωσε την" (apeleftherose tin) should be the correct sentence and instead it was "apletherisetis".
Ichabod says that the bill is $4.95 plus an additional 41 cents tax. A minute later he says that it's a 10% tax. Ten percent of $4.95 is 49 cents, not 41 cents.
The polygrapher does not follow any recognizable polygraph test. Such tests consist of asking the subject a series of yes and no questions, preceded by some baseline questions. The polygrapher lets Ichabod ramble on, which would make it impossible to get any usable readings.