Near the end, a confused man is being dragged down the hallway crying out that they think he has been impersonating Number 2. He is wearing a distinctive striped scarf. A very similar scarf was routinely worn by Number 2s in the original 'The Prisoner'.
In the nightclub den of iniquity we see a Victorian bicycle with one large and one small wheel. That is commonly called a penny-farthing and was frequently seen in the original 'The Prisoner'.
This series was Americanised for profit. The series was made in the 60's in Wales and had a location that America could not hope to emulate.