Potter contributed "Moonlight on the Highway" to ITV's "Saturday Night Theatre" series which was broadcast on 12 April 1969. The play centred on a young man (Ian Holm) who attempts to blot out memories of the sexual abuse he had suffered as child in his obsession with the music of Al Bowlly. As well as being an intensely personal play for Potter, it was his first foray in the use of popular music to heighten the dramatic tension in his work. Four days later Potter's "Son of Man", in which the dramatist gives an alternative view of Christ's last days, went out as a "Wednesday Play" on BBC1 with Northern Irish actor Colin Blakely as Jesus. It led to Potter being accused of blasphemy, and the first of his many clashes with morality campaigner Mary Whitehouse.