[communicator chirping] geological technician fisher, ready to beam up. All right. Locked onto you. Energize. [beeping] coadjutor engagement. What happened . I took a flop. Ontotohat . I dont know. Some kind of yellow ore. Magnetic. Decontaminate that uniform. Yes, sir. [communicator signal] captain kirk readady to beam up. Just one moment, captain. It checks out ok now. You better go get a synchronic meter so we can doublecheck. Yes, sir. Are you all right, captain . Yes, im all right. Just a little dizzy. Here, let me give you a hand. I cant get through there. Nothing serious. Wilson will be right back, sir. [beeping] space. The final frontier. These are the voyages of the starship enterprise. Its fiveyear mission to seek out new life and new civilizations, captains log, stardate 1672. 1. Specimengathering mission on planet alpha 177. Unknown to any of us during this time, a duplicate of me, some strange alter ego, had been created by the transporter malfunction. [door opens] captain . Are you all right, sir . Can i give you a hand, sir . Thank you. It might profit you to let dr. Mccoy give you the once over. All right, engineer, ill have my engines looked to. Ships manifests, sir. I think theyre in order now. Thank you, yeoman. Thats all. Ive checked yes,s,ir. Ahh. [whirring] you picked a good day, fisher. Business has been lousy. Whatd you do, take a fall on purpose so you could get a little vacation . [door opens] er. I have no sympathy for clumsiness. No, sir. The hands much better, sir. What can i do for you, jim . [knock on door] yeah . Mr. Spock. Come in. Yes, mr. Spock, what is it . Is there something i can do for you, captain . Like what . Well, dr. Mccoy seemed to think that i should check on you. Thats nice. Come on, spock, i know that look. What is it . Well, our good doctor said that you were acting like. A wild man, demanded brandy. [laughs] our good doctors been putting you on again. Hmm. Well, in that case, if youll excuse the intrusion, captain, ill get back to my work. Captain. What is it, scotty . Transporter breakdown, sir. Continue circuit testing. We beamed up this animal, and. Well, look for yourself. Its in this specimen case. [growling and barking] yes . A few seconds after they sent this one up through the transporter, that duplicate appeared. Except its not a duplicate. Its an opposite. Two of the same animal, but different. One gentlethis. One mean and fierce that. Some kind of savage, ferocious opposite. Captain, we dont dare send mr. Sulu and the Landing Party up. If this should happen to a man. You startled me. Is there something that you can i help you, captain . Jim will do here, janice. Oh. Youre too beautiful to ignore. Weve both been. Pretending too long. Stop pretending. Aah lets stop pretending. Come here, janice. Dont fight me. Dont fight me, janice. Captain just a minute, janice. Just a minute aah ah. Aah ohh ohh geological technician fisher. Deck 12, section me . My yeoman said that . Ive been resting here since you left me. Alone, mr. Spock. Captain, dr. Mccoy reports that you demanded this brandy in sick bay and left with it. I found this bottle in yeoman rands quarters. Not true. I havent been to the sick bay. Then he kissed me and he said that we that he was the captain and he could order me. When you mentioned the feelings wed been hiding, and you started talking about us us . Well, he is the captain. I couldnt just. You started hurting me. I had to fight you, scratch your face. Yeoman. Look at me. Look at my face. Are there any scratches . I was sure i scratched you. I was frightened. Maybe yeoman. I was in my room. It wasnt me. Sir, fisher saw you, too. Fisher saw. If it hadnt been. I can understand. I dont want to get you into trouble. I wouldnt have even mentioned it. It wasnt me. It was you, sir. Do you know what youre saying . Yes, i know what im saying. You can go now, yeoman. Theres only one logical answer. Captains log, stardate 1672. 9. On the planets surface, temperatures are beginning to drop, our Landing Party there in growing jeopardy. S. How did all this happen . I dont know, sir, but when fisher came up, his suit was covered with a soft yellow ore that had highly unusual properties. It may have caused an overload. Cant tell, not yet. Does the transporter work at all . Yes, sir, but we dont dare bring up the Landing Party. It might be duplicated like this animal. How long will it take you to find the trouble . Cant say, sir. We just cant leave those four men down there. Ark. Theyll die. The surface temperature of that planet goes down to 120 degrees below zero at night. Were doing everything we can, sir. Yes, i know, scotty. About your double, captain. Yes, uh. Yes. Well have to find him. On killing it. We have no previous experience, no way of knowing what would happen to you. Thats right, we dont know. But the men have to be armed. The men are to be armed, with their phasers locked. I repeat, locked, on setting number one. There cant be any chance of him being killed. Hes to be taken without. If the men are forced to fire. He cant be killed. How shall we explain it to them, captain . The search parties are to capture you . Tell them. The search parties, captain. Yes. Ill make an announcement to the entire crew, tell them what happened. Its a good crew. They deserve to know. Captain. No disrespect intended, but you must surely realize to be vulnerable in the eyes of the crew. You cant afford the luxury of being anything less than perfect. If you do, they lose faith, and you lose command. Yes, i do know that, mr. Spock. What i dont know. Is why i forgot that just now. Mr. Spock. If you see me slipping again, your orders. Your orders. Are to tell me. Understood, captain. Something has happened to me. Somehow, in being duplicated, i have lost my strength of will. Decisions are becoming more and more difficult. This is the captain speaking. Theres an impostor aboard the ship, a man who looks exactly like me and is pretending to be me. This man is dangerous. Utmost caution is to be observed. The impostor may be identified by scratches on his face. Repeat. The impostor may be identified by scratches on his face. Section chiefs, assign personnel to the search. All search parties report to mr. Spock for assignment. Something . Oh, yes, yes. All hand phasers must be set on base cycle, stunning force. The impostor is not to be injured. Use minimum force. Repeat. Im captain kirk the imposter is not to be injured. Im captain kirk. Im captain kirk im captain kirk wilson sir . Wilson, give me your phaser. Yes, sir. How have you been . Fine, sir. Kirk hows it going down there, mr. Sulu . Its already 20 degrees below zero. Cant exactly call it balmy. Isnt there any way we can help them . Thermal heaters were transported down. They duplicated. They wont operate. Then weve got to get those men up. Mr. Spock . Spock here. Tains cabin. He says the impostor attacked him, called him by name, took his hand phaser. Acknowledged. Continue the search. Wed better find him before he. But how . Apparently, this double, however different in temperament, has your knowledge of the ship its crew, its devices. This being the case, by determining his next move. Knowing how the ship is laid out, where would you go to elude a mass search . The lower levels,. Set and locked on base cycle to stun, not to kill. What about your phaser, captain . Dont you think we ought to get some help, captain . No. I dont want anyone else to see the. Captain, you ordered me to tell you. You cant hurt me. You cant kill me. You cant. Dont you understand . Im part of you. I need you. I dont need you. [electrical crackling] hell be regaining consciousness soon, and not knowing what his physical state is, i dont think i dare give him a tranquilizer of any kind. I think wed better bind him. Yes. Yes, all right. Ing from my observations, captain, youre rapidly losing the power of decision. Do you have a point, spock . Yes. Always, doctor. We have here an unusual opportunity to appraise the human mind or to examine, in earth terms, the roles of good and evil in a man his negative side, which you call hostility, lust, violence, and his positive side, which earth people express as compassion, love, tenderness. Its the captains guts youre analyzing. Are you aware of that, spock . Yes. And what is it that makes one man an exceptional leader . We see here indications that it is his negative side which makes him strong, that his evil side, if you will, properly controlled and disciplined, is vital to his strength. Your negative side removed from you, the power of command begins to elude you