The Best Episodes Directed By Davis Guggenheim

The Unit is a covert team of U.S. Special Forces operatives who must undertake missions around the world. The latest newcomer is Bob Brown who joins Jonas' team and they set out to rescue an airliner filled with European businessmen who have been hijacked by terrorists. Meanwhile, Bob's wife Kim is struggling with how much control the Unit has on her own personal life.

In the first-season finale, Farnum and Tolliver take advantage of the arrival of a U.S. Army general. Adams teaches Clagett a thing or two about loyalty. Bullock reacts when Alma's father states his intentions regarding her claim.

When Lanie's report on the Barn is leaked to the press early, everyone fears the prospect of losing their jobs, including Aceveda, who's mentioned as the reason for most of the precinct's problems. Meanwhile, Gilroy skips bail and winds up on Vic's doorstep looking for help, forcing Vic and Shane to deal with him while Lem shows Strike Team newcomer Tavon the ropes; and Claudette faces some of her own demons as she and Dutch try to uncover the culprit behind a possible robbery/homicide, while Danny comes to a startling realization.

When a new boss, Alberta Green, takes over the CTU, Nina secretly continues to help Jack locate Teri and Kim while Jack tracks down investment banker Ted Cofell, a man who is mentioned on the decrypted key card. A shocked Senator Palmer learns that one of his associates may be willing to commit murder in order to protect his campaign.

A man named Andre Drazen contacts Gaines. Clearly disappointed that the morning's events did not go as planned he threatens to relieve Gaines of his assignment. Across town, Jack kidnaps Cofell and, after hearing Cofell's Serbian accent, has Nina break into an old case file profiling a secret mission Jack was on in Belgrade and Kosovo two years ago. Then Jack meets Cofell's contact: the man who claimed to be Alan York.

Mark and Kerry have to create a policy regarding HIV-positive employees, which leads to gossip amongst the nurses.

Sydney is tested by the DSR to discover her mysterious link to a chilling 500-year-old picture and prophecy foretold in a Rambaldi manuscript. Meanwhile, after uncovering the identity of the rogue group leader, "The Man," Sloane learns through fellow Alliance of Twelve member Edward Poole that a close friend may be in cahoots with the enemy.

An ex-boxer, an old friend of Simone's, refuses to admit he's getting forgetful. The FBI take over a kidnap case, but Simone and Sipowicz find an informant and work the case on their own.

Medavoy and Martinez investigate the murder of a voodoo priest. Russell gets assigned to help a drug enforcement team, working in the Precinct. Simone spots an old acquaintance, Hollie, who used to give him good information.

Believing he's been duped, Brom Garret threatens to call the Pinkertons on Swearengen. Star and Bullock finally reach a deal on their hardware-store property. A new gambling outfit arrives from Chicago.

Calamity Jane helps Doc protect a young girl who survived a recent massacre. New Yorker Brom Garret realizes he may not be cut out for prospecting. Dan mulls over a difficult order from Al Swearengen.

To help capture a serial rapist-turned-killer, FBI Special Agent Don Eppes recruits his genius brother Charlie, who uses a mathematical equation to identify the killer's point of origin by working back from the crime scene locations.

Bullock's form of vigilante justice meets resistance from the locals. The town fathers band together to fight an epidemic. Farnum reluctantly agrees to keep an eye on Alma and Trixie. Swearengen adds journalist to his colorful résumé.

A Limo driver is shot. Witnesses blame it on the passengers. Simone and Sipowicz search for his last clients. A new female detective joins the squad and immediately gets involved with a man receiving death threats. Simone helps Savino search for the killer of the girl shot through the peep-hole.

Bill Gates speaks about his life-or-death mission to get better sanitation to the developing world. Also, his sisters share their childhood memories.

The connections that shaped Bill's life come into focus, including a childhood friendship and his unique bond with Microsoft co-founder Paul Allen.

The search for climate change solutions requires passion, resources and a sense of urgency -- three qualities Bill Gates clearly possesses.