Greg Baldwin is an American voice actor. He is best known for inheriting numerous voice roles originated by Japanese-American actor Mako following his death in 2006, including Aku from the fifth season of Samurai Jack (2001) and the video game Cartoon Network Universe: FusionFall, Iroh in the third season of Avatar: Son Hava Bükücü (2005) (a role he later reprised in its sequel series Avatar: Korra Efsanesi (2012)), and Master Splinter in Ninja Kaplumbağalar 4: Ölümsüz (2007). Baldwin also made guest appearances on Sünger Bob Kare Şort (1999) The Marvelous Misadventures of Flapjack (2008), and Star Wars: Klon Savaşları (2008).