d he ran to the kitchen to reappear moments
later with a butcher knife in his hand.

The bell rang again. Dennis snarled at the door and, in some kind of
sheer ecstatic bravado, emitted a Tarzan roar.

Instantly a weight hit the door from the outside. It shuddered but did
not give. Dennis crouched, gripping his knife. Frank Corson staggered to
his feet and hurled himself groggily at the android. Dennis roared
again, pushed away and arced the knife at his throat.

Rhoda screamed and lunged at Dennis' legs. "No! No! Stop it! Please!"

Dennis teetered under her weight and the knife slanted downward across
Frank's chest. It ripped a red gash as the door shuddered a third time.

Dennis turned in that direction and crouched. The door splintered and
flew open. Dennis lunged, like a line-bucking football player. He hit
both Brent Taber and Captain Abrams simultaneously, sprawling them both
and sending Abrams' gun spinning out of his hand.

He leaped over them and dashed down the hall where the elevator man
waited uncertainly, not sure whether to dispute the right of way or not.
His indecision was fatal. Dennis wrapped an arm around his neck, pulled
his head back and cut his throat with one slash of the knife.

Captain Abrams' head had hit a doorjamb opposite the entrance to Rhoda's
apartment. He stirred and tried to come erect but he was unable to make
it.

Brent Taber clawed the gun off the floor and came to one knee. He got
off one shot as the elevator door was closing and saw the android spin
away from the controls as the impact of the slug smashed the bone of his
shoulder.

Taber lunged to his feet and went for the stairs.

There was no one in the lobby when he arrived there--no dead bodies,
either. But on the sidewalk, in front of the building, a woman lay dead
in a pool of blood.

In a sick rage, Taber looked in both directions and saw the android dive
through a group of people half a block away. He tipped them over like
tenpins and ran on. Taber gripped the gun tight and started in pursuit.

He could not fire because there was enough sidewalk traffic to make it
dangerous. On ahead, the android's path was blocked by a man. He sought
to get clear but the android passed him close enough to jam the knife
into his neck and send him screaming to the sidewalk.

A uniformed patrolman appeared on the other side of the street, further
down. He took the situation in and understood Taber's frantic gesture. A
car screa