MacLennan co-founded the Scottish left-wing agitprop theatre group
7:84 in 1971, with his sister Elizabeth and her husband
John McGrath. In 1978 he created the influential Wildcat Stage Productions (with
Dave Anderson) and worked with these two companies for most of his life. In 2004, MacLennan created
A Play, a Pie and a Pint at the Òran Mór in Glasgow; a lunchtime theatre concept which has since been implemented around the world. A documentary about this work by
BBC Two Scotland (titled ''A Play, a Pie and a Pint: Scotland's Theatre Revolution'') was announced on the day of MacLennan's death. ==Death==