- Scott: Doctor, I've seen the captain feverish, sick, drunk, delirious, terrified, overjoyed, boiling mad... but up to now, I have never seen him red-faced with hysteria.
- Mr. Spock: No, sir, I shall not withdraw a single charge that I have made. You are NOT Captain Kirk. You have ruthlessly appropriated his body, but the life entity within you is not that of Captain Kirk. You do NOT belong in charge of the Enterprise, and I shall do everything in my power against you.
- Dr. Janice Lester: I hoped I wouldn't see you again.
- Captain James T. Kirk: I don't blame you.
- Dr. Janice Lester: The year we were together at Starfleet is the only time in my life I was alive.
- Captain James T. Kirk: I never stopped you from going on with your space work.
- Dr. Janice Lester: Your world of starship captains doesn't admit women. It isn't fair.
- Captain James T. Kirk: No, it isn't, and you punished and tortured me because of it.
- Dr. Janice Lester: I loved you. We could have roamed among the stars.
- Captain James T. Kirk: We'd have killed each other.
- Dr. Janice Lester: It might have been better.
- [last lines of the series]
- Captain James T. Kirk: I didn't want to destroy her.
- Mr. Spock: I'm sure we all understand that, Captain.
- Captain James T. Kirk: Her life could have been as rich as any woman's, if only... if only...
- Sulu: The captain really must be going mad if he thinks he can get away with an execution.
- Chekov: Keptin Kirk wouldn't order an execution even if he were going mad. That cannot be the keptin.
- Sulu: What difference does it make WHO he is? Are we gonna allow an execution to take place?
- Chekov: If security backs him up, how will we fight him?
- Sulu: I'll fight them every way and ANY way I can.
- Mr. Spock: Sir, there is only one issue here: is the story of life-entity transfer believable? This crew has been to many places in the galaxy. They've been witness to many strange events. They are trained to know that what seems to be impossible often IS possible given the scientific analysis of the phenomenon.
- Dr. Janice Lester: It is mutiny! Deliberate, vindictive, insane at its base! But mutiny is charged... and encouragement to mutiny. Dr. McCoy, Mr. Scott, you heard it! On the basis of these statements, I call for an immediate vote... by the powers granted me as captain of the Enterprise. A recess is declared to be followed by a vote!
- Mr. Spock: Yes, sir. An immediate vote before our chief witness can be left to die on some obscure planet with the truth locked away inside of her.
- Dr. Janice Lester: Silence! You will be SILENT!
- Dr. Janice Lester: [in Kirk's body] Well... this is especially disturbing to me for... uh, personal reasons.
- Dr. McCoy: Oh? I didn't know you knew her that well.
- Dr. Janice Lester: Oh, yes. Been a long time since I saw her. I walked out on her when it became serious.
- Dr. McCoy: Well, you must have been very young at the time, Jim.
- Dr. Janice Lester: Youth doesn't excuse everything, Dr. McCoy.
- Dr. Janice Lester: [in Kirk's body] I already possess your physical strength, only THIS Captain Kirk is not afraid to kill.
- Dr. Janice Lester: [in Kirk's body] Dr. McCoy, I'm sorry but I'm going to have to take you off the case and turn it over to Dr. Coleman.
- Dr. McCoy: You can't do this! On this ship, my medical authority is final!
- Dr. Janice Lester: If Dr. Coleman wants to assume the full responsibility, let him do it.
- Dr. McCoy: I won't allow it!
- Dr. Janice Lester: It's DONE.
- Dr. Janice Lester: [in the body of Captain Kirk, narrating] James Kirk is returning to consciousness in the body of Janice Lester. The Enterprise is proceeding to its next mission, on the course set for it before I took over command. Now the years I spent studying every single detail of the ship's operation will be tested. With a little experience, I will be invulnerable to suspicion. At last I attained what is my just due - command of a starship. All the months of preparation now come to fruition
- Dr. Coleman: She is suffering from the delusion of being Captain Kirk.
- James T. Kirk: [in Janice Lester's body] I am NOT Janice Lester!
- Dr. Coleman: The paranoia has been developing for the past six months. The radiation seems to have intensified it. She must be kept sedated.
- Nurse Christine Chapel: Shall I prepare a mild sedative, Doctor?
- Dr. Coleman: Of course.
- James T. Kirk: [to Spock while in Janice Lester's body] You are closer to the captain than anyone in the universe. You know his thoughts. What does your telepathic mind tell you now?
- Dr. Coleman: I won't become a murderer.
- Dr. Janice Lester: [in Kirk's body] You ARE a murderer! You knew it was celebium; you could have treated them for it. You're a murderer many times over!
- Mr. Spock: Sir, if the diagnosis of Dr. Lester's illness is the critical problem, then the Benecia Colony is definitely not the place for her. Their medical facilities are the most primitive.
- Dr. Janice Lester: [in Kirk's body] They will have to serve.
- Mr. Spock: Starbase Two is fully equipped and staffed with the necessary specialists to determine exactly what is wrong with the doctor. Is that not crucial to your decision?
- Dr. Janice Lester: Thank you. Mr. Spock, but the facilities will be of little use if Dr. Lester's dead. Time is of the essence. Continue present course.
- Dr. McCoy: I appreciate the fact that you had a decision to make. I also find myself in that position now, Jim, and I'm asking you to report for an examination.
- Dr. Janice Lester: [in Kirk's body] What? What do you base that on?
- Dr. McCoy: Development of emotional instability and erratic mental attitudes since returning from that planet.
- Mr. Spock: Knowledge of the captain's aberrant behavior is spreading through the ship. The crew is becoming increasingly tense.
- Mr. Spock: I have a few questions to ask her.
- Lt. Galloway: Did the captain order it, sir?
- Mr. Spock: Why should he? They are my questions, therefore I am ordering it, Lieutenant.
- Dr. Janice Lester: [in Kirk's body] Attention all personnel: First Officer Spock has been placed under arrest. He has conspired with Dr. Lester to take over the ship from your captain. A hearing will be immediately convened to consider the charges and specifications of a general court martial on the charge of mutiny.
- Dr. Janice Lester: [in Kirk's body] Mr. Spock, were you aware of Dr. McCoy's findings?
- Mr. Spock: I know them now.
- Dr. Janice Lester: And what have you to say, now?
- Mr. Spock: I am disappointed and deeply concerned that there is no objective evidence to support my position. So far.
- Dr. Janice Lester: [in Kirk's body] Mr. Spock, if you'd concentrate on the areas for which you are responsible, Starfleet Command wouldn've been informed already.
- Mr. Spock: Since the captain usually deals directly with Starfleet in these matters, I assumed that my suggestions might be deemed interference.
- Dr. Janice Lester: [in Kirk's body] Violence, by the lady, perpetrated on Capt. Kirk? Tsk-tsk-tsk-tsk-tsk-tsk-tsk. I ask the assembled personnel to look at Dr. Janice Lester and visualize that historic moment.
- [with obvious amusement, but nobody else joins in on it]
- Dr. Janice Lester: Can you... can you tell me why, uh, Dr. Janice Lester would agree to this ludicrous exchange?
- James T. Kirk: [in Janice Lester's body] Yes. To get the power she craved, to attain a position she doesn't merit by temperament or training, and, most of all, she wanted to murder James Kirk - a man who once loved her - but her intense hatred of her own womanhood made life with her impossible.
- Dr. Janice Lester: [moving in to apparently strike her/him in rage, but...] Are you prepared with witnesses? One will do.
- Dr. Janice Lester: [in Kirk's body] I don't think another test is necessary.
- Dr. McCoy: The Robbiani dermal-optic is crucial. It reveals the basic emotional structure.
- Dr. Janice Lester: [in Kirk's body, at Spock's court martial] However, a-a-a-as I understand it, I... am Dr. Janice Lester.
- [laughs derisively]
- James T. Kirk: [in Janice Lester's body] That's very clever, but I didn't say it. I said the BODY of James Kirk is being used by Janice Lester.
- Dr. Janice Lester: Mm-hm. Mm, a subtlety that somehow escapes me.
- Mr. Spock: I expect only to reveal the truth.
- Dr. Janice Lester: [in Kirk's body, vehemently] And with the truth revealed that I am not really the captain, and knowing that she would not be allowed to serve as the captain, then YOU would be the captain. It is inevitable!