Cliff doesn't get along very nicely with a man that comes into the bar. He pushes it far enough to where he wants to fight Cliff. Cliff, being the coward he is, trys to back out of it. But when it's time to face the music, Cliff shows them some of his fighting skills that he doesn't have, and ends up asking Diane to bring him to the hospital.

The planet Frontios, in the distant future. Following Earth's destruction, a tiny colony struggles to eke out a life on this desolate world. But where do the bombardments that threaten them originate from? Little does the Doctor suspect that somewhere nearby lurks a power capable of ripping even the TARDIS apart...