Continuity mistake: Rafe and Kimble escape handcuffed together. They break the linking chain with a rock: each then wears a single bracelet. But when he kneels to examine the dead deputy, Kimble is wearing a cuff with an intact chain and an empty bracelet hanging from it. (00:28:45)
Continuity mistake: When Rafe is shot at the end, the gun he was holding in his right hand disappears between shots. (00:45:15)
Answer: Production vehicle models aren't in sync with the calendar year. The '65 Mustang began production in March 1964 and first sold in April 1964, before it was "introduced" the following year. I don't know which model was seen in the episode, but the 2+2 fastback was sold in September 1964. The 1964 film "Goldfinger" uses a 1965 Mustang as part of Ford's product placement. Basically, in the 1930's, FDR ordered automakers to release vehicles in the fall of the preceding calendar year "as a means of facilitating regularization of employment in the industry." Now, automakers can release new models as early as Jan 2 of the preceding year.
Bishop73