Sierra Mist Undercover Orange was an mandarin lemon-lime orange flavored soda that was promoting the 2008 American action comedy movie Get Smart. It was only available during the summer of 2008, and then discontinued.
In December 2007 PepsiCo trademarked the names Sierra Mist Undercover Orange and Sierra Mist Free Undercover Orange. The two sodas launched in the summer of 2008 (with the faces of Steve Carell and Anne Hathaway on their labels) as a marketing tie-in with the release of the Warner Bros. film Get Smart on June 20, 2008. Sierra Mist: Undercover Orange and Sierra Mist Free: Undercover Orange were both clear sodas, like regular and diet Sierra Mist, but had a mandarin orange flavor.