OK K.O.! Let's Be Heroes in: A Night at Monstervania

'OK K.O.! Let's Be Heroes in: A Night at Monstervania' is a half-hour ''OK K.O.! Let's Be Heroes'' Halloween special.

Summary
K.O., Radicles and Enid go to Monstervania to find monsters living in Monstervania. Rad and his new girlfriend, Aranea, who is a spider girl are kidnapped and under the influence of Viola, an evil witch and K.O. and Enid must save Rad and Aranea!

Cast

 * Courtenay Taylor as KO
 * Ian Jones-Quartey as Radicles, Gregg and Darrell
 * Ashly Burch as Enid
 * Erin Fitzgerald as Nagaline Lamialong
 * Erica Mendez as Viola
 * Melique Berger as Wilhamena
 * Dave Fennoy as Bernard and Spanky
 * Joe Nipote as Crudde
 * Kate Flannery as Carol
 * David Herman as Mr. Gar and Brandon
 * Jim Cummings as Lord Boxman
 * Steven Ogg as Professor Venomous and Shadowy Figure
 * Lara Jill Miller as Fink
 * Kari Wahlgren as Shannon
 * Robbie Daymond as Raymond
 * Melissa Villaseñor as Drupe, Shy Ninja, Punching Judy and Potato
 * Kali Hawk as Red Action
 * Cole Sanchez as Colewort
 * Andrés du Bouchet as Joe Cuppa
 * Melissa Fahn as Dendy and a Aranea Webb
 * James Urbaniak as Mr. Logic
 * Chris Niosi as Nick Army