The five voice actors for the main characters -
Scott Menville,
Hynden Walch,
Greg Cipes,
Tara Strong, and
Khary Payton - reprise their roles in the fourth season as
Robin,
Starfire,
Beast Boy,
Raven, and
Cyborg, respectively.
Dee Bradley Baker recurs in the season, providing voices for several characters, including Space Monster in the episode "Stranded" and
Plasmus in the episode "The End" Part 1.
Kevin Michael Richardson returns to the series, providing the voice for
Trigon, Raven's father and the season's main antagonist as well as voices for various roles, including The Bear and The Snake in the episode "The Quest" and reprises his role as
Mammoth and
See-More in the episode "Mother Mae-Eye".
Ron Perlman reprised his role as
Slade in the season. Season four of
Teen Titans featured numerous guest actors providing voices for recurring and guest characters. In the episode "Don't Touch That Dial",
Alexander Polinsky reprises his role as the villain Control Freak. The episode also features the voices of
Jeff Bennett,
Rob Paulsen, and
James Arnold Taylor for various roles.
Rodger Bumpass reprised his role as the villain
Doctor Light in the episode "Birthmark". The episode "Cyborg the Barbarian" features the vocal talents of
Kimberly Brooks as Sarasim and
Michael Clarke Duncan as both Krall and Hayden. The episode "Employee of the Month" featured
Tom Kane voicing Beast Boy's boss Bob and
Rob Paulsen voicing the villain The Source. In the episode "Troq",
Stephen Root provides the voice of Val-Yor, an alien fighting a militia of robots while harboring hate towards Starfire and her race. The episode "The Prophecy" features
Virginia Madsen voicing the character
Arella.
Jason Marsden played the villain
Billy Numerous in the episode "Overdrive". In the episode "Mother Mae-Eye",
Billie Hayes provided the voice for the villain Mother Mae-Eye while
Lauren Tom provided voices for the characters
Gizmo and
Jinx. ==Reception==