"Echo Kellum"@de . . "Echo Kellum"@en . "Echo Kellum"@en . . . . . . . "Echo Kellum"@de . "Echo_Kellum_2016.jpg"@de . . . . "Echo Kellum"@en . . "Echo Kellum is an American actor and comedian. He portrays Curtis Holt in a recurring starring role in the fourth season of Arrow and as a series regular in the fifth season."@en . . . . . "Echo Kellum"@en . . . . "Echo Kellum (b. TBA) portrays Mister Terrific in Arrow."@en . . . . . "Arrow"@en . "Echo Kellum (b. TBA) portrays Mister Terrific in Arrow."@en . "Echo Kellum is an American actor and comedian. He portrays Curtis Holt in a recurring starring role in the fourth season of Arrow and as a series regular in the fifth season."@en . .