Erik Todd Dellums (born September 23, 1964) is an American actor and narrator. On television, he is known for playing the drug kingpin Luther Mahoney on Homicide: Life on the Street (1996 - 1998) and Dr. Randall Frazier on The Wire (2002 - 2004). He voiced Koh in Avatar: The Last Aribender (2005) and Aaravos in The Dragon Prince (2018 - 2024). Dellums also has performed voice work in video games, including the roles of radio DJ Three Dog in the Fallout 3 (2008), Nazir in Skyrim (2011), and Prince Arcann, Thexan, and Oggo in Knights of the Fallen Empire (2015). Dellums appeared in minor parts in the Spike Lee films She's Gotta Have It (1986), School Daze (1988), and Do the Right Thing (1989).