Jack returns to Britain and is fired; Ulli thinks that he has trapped Helen and intercepted a heroin shipment.
Jack returns to Pakistan and demands the arrests of drug dealers before he agrees to sign an aid agreement; Helen tries to make a deal with Tariq.
Fazal supervises conversion of the opium crop to heroin; Karl's trial begins; the customs dispute worsens.
Fazal's family is not convinced that life in Karachi is better than life on the frontier; Jack tries to head off a threatened customs strike.
Ulli tries to avenge Dieter's death; Helen plans to resume heroin trafficking; Fazal remains in jail; Jack searches for Caroline. With Bill Patterson, Lindsay Duncan.
Opium farmer Fazal (Jamal Shah) is forced to Karachi after his poppy fields are destroyed; Jack's (Bill Paterson) report to the Commons becomes a personal concern.
Karl's creditors harass Helen; Karl's trial begins; Caroline's worsening condition forces Jack to make decisions about his life. With Bill Patterson, Lindsay Duncan.
Two German policemen find a major heroin smuggling ring. When the ring leader is arrested, his wife takes over the business.
British politician Jack Lithgow's incursion on Pakistani opium production endangers a farm family; a drug bust makes Helen reflect. With Bill Patterson, Lindsay Duncan.