Martin Mystery S03 E13 Day of the Shadows (1)

Martin, Diana, and Billy are confused when one day they wake up to find themselves the only ones on campus...and the world. They soon meet Kaitlin, another confused person who turns out to be almost like Martin's clone. They find Billy after Diana disappears into a black hole, and find out that people's own shadows are attacking them and dragging them into a strange shadow world.