The Disney Channel (Mondays, 7:30 p.m. ET)
On a trip into the Outback, a 14-year-old boy walks into a magnetic field. (About the size of a recreational van and shimmering like water, it looks like a freestanding wading pool.) He reemerges into an alternative universe, your basic two-class society of peasants and tyrants. The latter usually arrive unannounced in corroded metal airships. This half-hour sci-fi series from Australia isn’t wildly imaginative, but the story is sturdy, and the airships impressive.