Greg Hunter. Test pilot—happy only when his life hung in the balance.

Tom Hunter. A pioneer—his frontier was hidden in test tubes.

Johnny Coombs. A prospector—he returned from the asteroids too soon.

Merrill Tawney. An industrialist—he sought plunder even beyond the stars.

Major Briarton. A government man—his creed was law and order.

They fought with whatever was handy, not bothering to figure the odds.