The epic conclusion of 'Planetfall.' Worlds collide-literally-as living planets Ego and Alter-Ego tear into each other...with Earth as collateral damage! Can the god of thunder halt the global-scale mayhem before all three planets are atomized-or is one world destined for destruction? Plus: The Stranger! The Collector! Zephyr! Black holes and dream realities! This one's got it all.

Rated T+