After Henry Taylor gets off the train at the beginning of the episode he hands to the Station Master what looks very much like a genuine 20 dollar bill. When the camera angle changes, the bill has changed into a generic fake bill.
The day of the robbery is described as a very cold winter day with mention of ice covered roads. Mr. Spengler is wearing a heavy over coat and hat when he goes to his car to go home and see about his ill wife. Yet when he gets to his car and even after he gets in his car and attempts to start it the windows are rolled down and even the wing glass is open.
At the end, the manager admits he stole the $200,000 and hid the money in is safe deposit box in the bank. However, once the $200,000 went missing, the safe deposit boxes of any employees who had one would have been searched immediately.