First broadcast: Fri 17th May 1985, 16:35 on BBC One London Johnny Ball presides over the last game in this series in which: Trefor Roberts sees the light; Joanne Lloyd ties herself up in knots; Timothy Perkins pulls a few strings; but Mark Curry is a little bored! Can Catherine Elcombe , Alison Bettles , Stephen Mullen and Darren Traynor sort all this out?