"Seeing Isn't Believing" is the twelfth episode of Gargoyles: The Goliath Chronicles.
Proteus, the villain from New Olympus, escapes from captivity and heads for New York to cause trouble for the clan and Elisa. Taking Goliath's form, he commits many crimes. When confronted by (his New Olympian jailer) Taurus, Elisa and Goliath, Proteus takes on Elisa's form to cause confusion. However, Goliath easily tricks Proteus into revealing himself by asking if Elisa ever doubted his innocence; Proteus answered "no", which is the opposite of what Elisa would say. Captured, Proteus is taken back to New Olympus by Taurus. Elisa tells Goliath that it was rather cruel of him to ask that question.