Show #48 (season 4, edition 12)

Debut: FRIDAY, MAY 6 (11:00-11:30 p.m. ET/PT)

Other HBO playdates: May 6 (12:30 a.m.), 7 (3:00 a.m.), 9 (1:10 a.m.), 10 (4:30 p.m.) and 11 (9:00 p.m.)

HBO2 playdate: May 8 (6:30 p.m.) and 11 (4:45 a.m.)

The show is also available on HBO NOW, HBO GO and HBO On Demand.

"The End of Polio": Pakistan is the last battleground in the fight to eradicate polio: Since the late '80s, new cases of the disease have dropped from hundreds of thousands per year to just hundreds. But in Pakistan's poorest areas, there is widespread distrust of vaccinators, and the Pakistani Taliban has openly condoned violence against them, especially after the CIA used a vaccinator to help track down Osama bin Laden. Ben Anderson travels to Karachi to meet the health workers putting their lives on the line to finally eradicate this disease.

"Collateral Damage": Land mines are deadly weapons of war that remain a threat years after fighting ends. But although international pressure has helped limit the use of land mines, unexploded cluster munitions are still in use, killing and maiming civilians every day. Kaj Larsen travels to Myanmar and Laos to see the devastating effects of unexploded ordnance and meet the trained disposal teams working to clean up these weapons before they claim more lives.