Be Cool, Scooby-Doo! Episode 20 Giant Problems Episode Title:Giant Problems.Episode Description:Daphne takes the gang to her family's ancient castle, which her mother forgot she had. After a giant begins trying to scare her out of the castle, the gang is on the case, but things become challenging when Fred insists on wearing knight armor throughout the entire mystery, and Daphne speaks in an Irish accent which irks Velma.