Tom Clancy's Splinter Cell: Pandora Tomorrow is a stealth video game developed and published by Ubisoft Shanghai and Ubisoft Milan, while Ubisoft Montreal, developer of the original Splinter Cell, was working on Chaos Theory. Pandora Tomorrow is the second game in the Splinter Cell series endorsed by writer Tom Clancy. The game follows the covert activities of Sam Fisher, an agent working for a black-ops branch of the National Security Agency (NSA) called "Third Echelon". Sam Fisher is voiced by Michael Ironside. Dennis Haysbert voices the character Irving Lambert, Fisher's boss, making this the only time he is not voiced by Don Jordan. Lalo Schifrin provides the theme music for the game. A remastered high-definition version of Tom Clancy's Splinter Cell: Pandora Tomorrow was announced for the PlayStation Network for the PlayStation 3 on December 20, 2010.