Now in its third week, The Wall continues to attract very decent ratings. But I can’t be alone in struggling to understand the convoluted rules. It takes most of the hour to figure it out, by which time you might as well keep watching to find out if the contestants will actually take home any money. It’s a nice concept: teams are people who deserve a free kick, and host Axle Whitehead does his best to keep up morale. But the execution is longwinded, and players shouting at the wall, as if to encourage it, is odd.