Star Trek: The Way to Eden (1969): Eden Sighting - Be Assured, Also. I
The mighty guru-like Dr. Sevrin reacts accordingly when Eden is first sighted, and is located in time/space. Adam is inspired to perform a haunting ballad. Irina is rightly concerned when ultrasonic frequency is used against the Enterprise crew; the level being used is extraordinarily high. But the persuasive Sevrin uses his Svengali-like powers to assuage one and all.
