

Number 6 swears to avenge the death of a girl who was being
persecuted by Number 2 and
subsequently jumped from a window,
Number 6 being too late to save her.
Number 2 is paranoid that Number 6 has been sent as a plant to spy on him on behalf of his superiors. Number 6 senses the paranoia in the new Number 2 and builds-up the impression that he is in touch with the outside world and makes Number 2 more and more unstable. His paranoia reaches it's peak when he thinks everyone is against him and out to betray him.
Number 2 finally reaches the stage of total mental collapse to the delight of Number 6.............
Written by Roger Woddis
Produced by David Tomblin
Directed by Pat Jackson
Stars

Patrick McGoohan - Number Six
Patrick Cargill - Number Two
Patrick Cargill was previously seen as 'Thorpe' in 'Many Happy Returns', but the two characters aren't meant to be the same.
The 'Kosho' game appears for the first time.