“Taxi to the Dark Side” (9 p.m., HBO): “Taxi to the Dark Side” is a

“Taxi to the Dark Side” (9 p.m., HBO): “Taxi to the Dark Side” is a wrenching documentary with heavy relevance for Election Year 2008 and beyond. The title refers to an innocent young Afghan taxi driver named Dilawar who was killed while being held in Bagram prison in 2002. And it refers to a statement from Vice President Dick Cheney a few days after the 9/11 attacks: “We also have to work the dark side, if you will,” he said, describing U.S. strategy for bringing terrorists to justice. The film examines highly questionable interrogation practices used by U.S. military guards on prisoners in Bagram, Abu Ghraib and Guantanamo Bay. Written, produced, directed and narrated by Alex Gibney (“Enron: The Smartest Guys in the Room”), “Taxi to the Dark Side” won the 2008 Academy Award for Best Documentary Feature and a 2007 Peabody Award, among its many honors.

“Chuck” (8 p.m., NBC): The secret agent starts a second season, but he’s not quitting his day job at a low-price tech store.

“Life” (10 p.m., NBC): The law officer with a broken past is now beginning his life anew in the second-season opener.