343 Guilty Spark, also known as just Spark, is a character in the military science fiction Halo franchise. Spark plays a major role in the storyline of the original Halo video game trilogy: the character appears in Halo: Combat Evolved, Halo 2, and Halo 3, as well as the remasters Halo: Combat Evolved Anniversary and Halo 2: Anniversary, and the remake Halo: Campaign Evolved. Spark is voiced by actor Tim Dadabo in most media, while Harry Lloyd voiced the character in one episode of the television series adaptation of Halo.