The attack on Dr. Givens happened on October 28, 1976. Despite this, several characters refer to the incident as having taken place 15 years prior. This is incorrect as Dr. Givens was 15 at the time of her abduction 20 years earlier.
When Dr. Givens is entering data to return to February 16, 1980, the display reads "ACTIVATE SPACIAL COORDINATES", but it should be "SPATIAL".