"Helen Darrow?"
I laughed. "It's no good, Doctor. It won't work."
"I'm going to call a doctor for you, Mr. Cameron. I hope what you say about killing a girl is not true. But I'm afraid I shall also have to call the police."
For the first time I felt a twinge of doubt. His reactions were not what I had expected. But he had to be the other alien. It couldn't be anyone else.
He took a step away from me. "Don't move!" I snapped.
He froze. I pushed the muzzle of the gun hard against the back of his neck.
"If you do that again, I'll kill you!" I said savagely.
For a moment he was silent. Then he spoke quietly, his voice soothing like that of a parent talking to an offended child. "That will accomplish nothing except my pointless murder, Mr. Cameron. I will do all I can to help you. And I assure you that you will not be held responsible for the killing of this—this girl you say is dead. You are not of sound mind. I can testify to that and I'll be believed. My word carries a lot of weight."
"I'm sure it does. But you're not going to testify to anything. I'll think no more of destroying you than the other one. It will give me pleasure."
"You keep saying you killed one of these—these aliens of yours. Tell me, how did you succeed in doing it? Didn't you tell me they were able to control your mind? Surely the creature would have been able to stop you."