Terror of the Black Night:
Grim makes Billy put on a suit of armor that's cool at a medieval fair, but he can't take it off until he defeats somebody in competition.
Battle of the Bands:
Billy and his dad try to beat Grim and his band in the Endsville Battle of Bands.
Halls of Time:
Grim takes Billy, Mandy and Irwin to the Halls of Time and there, Billy and Irwin mess with the hourglasses.