Modern remastered editions also clearly show that the driving sequences in London are actually stock footage of McGoohan. The episode was so formatted in order to allow McGoohan to take a leave of absence from the series to film his role in the motion picture Ice Station Zebra.
Re-released versions of this show clearly demonstrate that the driving scenes in London are actually pre-existing footage of McGoohan. The episode was specially formatted so that McGoohan could temporarily step away from the series to work on the movie Ice Station Zebra.