Kirk tries to teach Charlie martial arts. Sam, Kirk's training partner, laughs at one of Charlie's falls, and Charlie makes him "vanish". Shocked, Kirk calls for security guards to escort Charlie to his quarters. Charlie makes all phasers on the ship disappear, but ultimately yields to Kirk's order that he return to his quarters. Records show that Charlie's abilities are the same as those of Thasians, but the medical examination McCoy conducted when Charlie came on board confirmed that he is human. Charlie admits he used his powers to remove a vital component of the Antares. Frustrated at the adversarial turn in his relationship with the crew, Charlie breaks out of his quarters and begins to use his powers on the crew - changing their physical forms or freezing them according to his whim. When Rand resists his romantic advances and slaps him, he makes her "disappear." When Kirk demands to know if Rand is dead or alive, Charlie refuses to tell him.
