Any series looking at flawed, substance-abusing leaders had to get around to Boris Yeltsin. The former Russian president (1991-'99) was not one to let official business get in the way of a good time and there's ample evidence of his fondness for a drink. Alcoholism, however, appears to have been the tip of the iceberg; Yeltsin was prone to hypomania and savage bouts of depression, attempted suicide on several occasions and was dogged by a near-fatal heart condition. Combining extracts from Yeltsin's memoirs with the recollections of former bodyguards, colleagues and doctors, this episode paints a depressing picture of a man who coped badly with stress and squandered the opportunity to lay the seeds of a vibrant democracy. There are few surprises, but it does provide a good overview of his years at the top. And there's always that footage - Yeltsin flapping about on stage, dementedly conducting orchestras and staggering through ceremonial parades while those around him fight to maintain their fixed, diplomatic grins.