Near the end of the tale, the doctor states the date as the 21st century, when the date was from the 25th century. Doubly curious because earlier his wife describes the date correctly as being from the 25th century.
As Angie (Vickie Cummings) stabs her husband Arthur (Joseph Anthony) in the back, when he falls to the floor, there is no sign of a stab mark piercing his jacket or any blood from the wound.
When the doctor is reading the date on the scalpel, he states the date as "July 15, 2450" but the date shown clearly says July 18, 2450.