Richard Steven Horvitz is an American actor and comedian, best known for his voice work in animation and video games. His voice credits include the original Alpha 5 on Mighty Morphin Power Rangers, Power Rangers Zeo and Power Rangers Turbo, Razputin Aquato in Psychonauts, Kaos in Skylanders, Billy and his father Harold in Grim & Evil and The Grim Adventures of Billy & Mandy, Grey Matter in Ben 10, Rodney in Squirrel Boy, Daggett in The Angry Beavers, Zim in Invader Zim, Orthopox in Destroy All Humans!, the Zoni in Ratchet & Clank, Bumble in Kinectimals, the Space Weaver in Broken Age, Kanchomé in Zatch Bell!, and Moxxie in Helluva Boss.

Alpha 5 is a fictional character from the television series Mighty Morphin Power Rangers. A fully self-aware artificial intelligence, he is the robotic assistant of the Power Rangers, and resides in their base of operations, the Command Center along their mentor Zordon. The character is known for his "Aye-yi-yi-yi-yi!" catchphrase.