9 p.m. June 26, TNT Just when the caper series "Leverage" was getting a little too repetitive and sunny, Timothy Hutton's team of Robin Hoods heads off to Alaska. Sure, these grifters do what they always have--take down the powerful in service of their victims. But the Season 4 premiere benefits from the gravitas of guest star Eric Stoltz, who plays a missing mountain climber with a secret. The team infiltrates a millionaire's climbing expedition to find out what happened. Always engaging and fun, "Leverage" has an easy-breezy charm, but don't pay too close attention to the details. Many of these cons are far-fetched if not impossible.