When the girls surprise Stacey in New York, Kristy tells her that Charlie drove them. Charlie Thomas is Kristy's older brother in the books that this TV series is based on. They call his car the Junk Bucket and it is described as grayish with scratches, dents, and the fenders rusting.
All the girls' fathers appear though the only one credited is the actor portraying Stacey's dad.
Stacey's full name is revealed as Anastasia Elizabeth McGill