Girl Vs. Monster (television) A Disney Channel Original Movie, premiering October 12, 2012. Teenaged Skylar inadvertently unleashes an immortal monster, Deimata, when defying her parents’ wishes to stay home on Halloween and discovers the family secret that she is a fifth generation monster hunter. Skylar and her friends must join together to defeat the monster menace. Directed by Stuart Gillard. Stars Olivia Holt (Skylar), Brendan Meyer (Henry), Kerris Dorsey (Sadie), Katherine McNamara (Myra), Luke Benward (Ryan Dean), Tracy Dawson (Deimata).