The photo of Lisa Galloway's original appearance is actress Sondra Blake.
The photo of Lisa Galloway's original face and a pupil in the classroom both are sporting the iconic Farrah Fawcett "do", the feathered hairstyle which she made famous in Charlie's Angels.
In the flashback scene, where Oscar has to try to decide which is the real Jaime, the real Jaime jumps up to and hangs from a large pipe on the ceiling. When she drops back to the floor, it is obviously a MALE stuntman in a dress and wig.