Chuck is a mixture of "spy-fi", action, adventure, drama, and comedy. The main ingredient is comedy, as any of the advertisements for the show would attest, but Chuck combines all those elements into a potent mixture. TV shows in the past have combined all those things into a cohesive package, but always with either drama, horror, or action as the primary backdrop. Never before has a show taken all the ingredients in such delicate proportions and tied them all together so well thematically.