Andrew Porter recalls "from August 1971, a three part serial called Joker. A troupe of travelling entertainers feature in it, using an early Bedford SB with what looked like either Plaxton or Gurney-Nutting coachwork, in a psychedelic colour scheme. Any one else remember Tarot?"
'Joker' was one of four multipart stories in season 2; unfortunately seasons 1 and 2 were destroyed, so only season 3 remains. The now defunct Ace of Wands fan website had this photograph: